Should I Refuse the Breathalyzer in an Arizona DUI Stop?

The strategic calculus is clear: refuse the breathalyzer before arrest, but do NOT refuse the breathalyzer after arrest.

The Administrative License Suspension is Immediate, Certain, and Devastating

When you refuse the breathalyzer test in an Arizona DUI stop after you have been formally arrested, Arizona Revised Statutes § 28-1321(B) (A.R.S. § 28-1321(B)) mandates an automatic, immediate, and non-discretionary administrative license suspension. Let me be crystal clear about the timeline and severity of refusing the breathalyzer after arrest:

Refusal vs. Test Failure: The Devastating Math

(A.R.S. §§ 28-1321(B), 28-1385(A))

The difference: Refusing the breathalyzer gives you 270 extra days (9 months) without a license compared to submitting and failing.

Now compare this to what happens if you submit to the chemical test and the result shows a blood alcohol concentration of 0.08% or higher. Under Arizona Revised Statutes § 28-1385 (A.R.S. § 28-1385), the administrative license suspension for a first offense test failure is ninety days (Id. at subsection (A)). Ninety days versus twelve months. That is a difference of 270 days—more than nine additional months—during which you have no legal ability to drive.

Let that disparity sink in. By choosing to refuse the breathalyzer after arrest, you are guaranteeing yourself a suspension that is four times longer than the suspension you would face for taking the test and failing it. And this is not a potential or possible suspension that depends on the outcome of a hearing or a trial. This is an automatic, mandatory suspension that takes effect by operation of law 30 days after you refuse the breathalyzer.

The practical, real-world impact of a 12-month driver’s license suspension in Arizona is absolutely catastrophic for most people:

Employment consequences: If your job requires driving—whether you are a delivery driver, a sales representative, a home healthcare worker, a real estate agent, a service technician, or any one of countless other occupations—you will lose your ability to perform the essential functions of your job. Many people lose their jobs entirely. Even if your job does not directly require driving, if you cannot get to work because you have no license and Arizona has limited public transportation outside of downtown Phoenix and parts of Tucson, you may be forced to quit or be terminated.

Family responsibilities: If you are a parent, you lose the ability to transport your children to school, to medical appointments, to extracurricular activities, to emergencies. If you are a caregiver for elderly parents or disabled family members, you cannot take them to their doctors or run necessary errands. The burden falls on your spouse, your family members, your friends—straining relationships and creating enormous hardship.

Daily life activities: Simple tasks that people with a valid license take for granted become enormous logistical challenges. Grocery shopping. Going to the pharmacy. Attending medical appointments. Going to court for the very DUI case that caused the suspension in the first place. Everything becomes a coordinated effort involving rides from others, expensive rideshare services, or attempting to navigate inadequate public transportation.

Financial consequences: Even if you somehow manage to keep your job without a license, your auto insurance rates will skyrocket—if you can get insurance at all. You will likely be required to obtain expensive SR-22 high-risk insurance. You will be required to pay substantial reinstatement fees to the Motor Vehicle Division when the suspension period ends. The total financial cost of a 12-month suspension resulting from refusing the breathalyzer, when you add up lost wages, increased insurance, reinstatement fees, alternative transportation costs, and legal fees, can easily exceed $15,000 to $25,000 or more.

Ignition Interlock Device requirement: Even after your suspension period ends, Arizona law typically requires you to install and maintain an ignition interlock device on any vehicle you operate for a substantial additional period. This device, which you must blow into before the car will start and at random intervals while driving, costs approximately $75-$100 per month for rental and maintenance. For a refusal case, the interlock requirement is often 12 months on top of the 12-month suspension—meaning two full years before you can drive normally again.

For most Arizona residents, particularly those living in suburban and rural areas without comprehensive public transportation systems—from Maricopa County to Pima County, from Yuma to Flagstaff—losing your driver’s license for a full year is functionally equivalent to losing your job, straining your family to the breaking point, and being unable to meet basic life responsibilities. It is not an exaggeration to say that the administrative license suspension can be more immediately damaging to your life than even the criminal penalties. This is why the decision to refuse the breathalyzer after arrest is almost always the wrong choice.

Refusing the Breathalyzer Does Not Prevent Evidence Collection—It Only Makes Things Worse

Here is a critically important fact that many people do not understand: refusing the breathalyzer or chemical test after arrest does not mean the State will be unable to obtain blood alcohol evidence. It does not mean you have successfully avoided providing BAC evidence. In the vast majority of cases, all you have done is delayed the inevitable while guaranteeing yourself a year-long license suspension.

Arizona law enforcement agencies have invested millions of dollars in technology and training specifically designed to overcome chemical test refusals and the decision to refuse the breathalyzer. The Arizona Highway Safety Annual Report for Federal Fiscal Year 2023 (NHTSA Arizona FFY 2023 Report), published jointly by the Governor’s Office of Highway Safety and the National Highway Traffic Safety Administration, documents the statewide implementation and expansion of Arizona’s sophisticated “Electronic Search Warrant” system (Id. at pp. 15-17).

CRITICAL FACT: Officers across Arizona, from Maricopa County to Pima County, from rural Yuma County to Coconino County, can now “obtain electronic search warrants from a Superior Court judge…in less than eight minutes” using the statewide e-warrant system (Id. at p. 16). Over 7,800 officers are certified to use this system (Id.).

This system allows law enforcement officers in the field—sitting in their patrol cars at the side of the road or at the police station—to electronically prepare, submit, and obtain search warrants for blood draws from on-call superior court judges. The process has been streamlined and optimized to the point where, according to official state data, officers can now “obtain electronic search warrants from a Superior Court judge…in less than eight minutes” (Id.).

Let me emphasize that timeframe: less than eight minutes from the moment you refuse the breathalyzer to the moment the officer has a judge-signed search warrant authorizing a compelled blood draw.

The report further notes that “over 7,800 officers” across Arizona have been certified and trained to use the electronic warrant system, and the system is operational statewide in all 15 counties (Id. at p. 17). This means that whether you are stopped in metropolitan Phoenix, rural Yuma County, or anywhere in between, the officer who arrests you for DUI almost certainly has the ability to obtain a blood draw warrant within minutes if you refuse the breathalyzer test.

This electronic warrant capability is a direct response to the United States Supreme Court’s decision in Missouri v. McNeely, 569 U.S. 141 (2013) (McNeely, 569 U.S. at 141), which held that the natural dissipation of alcohol in the bloodstream does not, by itself, create a per se exigent circumstance that automatically justifies a warrantless blood draw in every DUI case (Id. at 156). The Court ruled that “whether a warrantless blood test of a drunk-driving suspect is reasonable must be determined case by case based on the totality of the circumstances” (Id.).

Arizona’s response to McNeely was simple and effective: if the Fourth Amendment requires warrants for blood draws, Arizona will make it incredibly fast and easy for officers to get warrants. The practical effect is that the warrant requirement poses virtually no obstacle to obtaining blood evidence from drivers who refuse the breathalyzer testing.

Here is what actually happens when you refuse the breathalyzer in an Arizona DUI stop after arrest:

1. You refuse the breathalyzer test.
2. The officer informs you that your license will be suspended for 12 months.
3. The officer immediately begins preparing an electronic search warrant application while you sit in handcuffs.
4. Within 8-15 minutes, a judge reviews and signs the warrant electronically.
5. You are transported to a hospital, a police station with a qualified phlebotomist, or a mobile blood draw unit.
6. Your blood is drawn by force if necessary—you will be physically restrained if you resist.
7. The blood sample is sent to the Arizona Department of Public Safety crime lab for analysis.
8. Several weeks later, the lab report comes back showing your BAC.
9. The State now has blood evidence to use against you in the criminal case.
10. AND you have a 12-month administrative license suspension that has already taken effect.

You have gained absolutely nothing by refusing the breathalyzer except a suspension that is nine months longer than it needed to be. The State has the same BAC evidence it would have had if you submitted to the test voluntarily, and you have made your legal situation objectively and substantially worse.

Chemical Test Results Can Be Challenged on Technical and Procedural Grounds

One of the most important strategic reasons to submit to the chemical test rather than refuse the breathalyzer is that breath and blood test results, while certainly damaging, are not infallible or unchallengeable. Arizona law establishes strict, detailed, technical foundational requirements for the admissibility of chemical test results in criminal trials. These requirements create multiple opportunities for a skilled DUI defense attorney to challenge the validity of the test results, file motions to suppress the evidence, and potentially get the BAC results excluded from trial entirely.

If the State cannot introduce your BAC at trial, the prosecution’s case becomes dramatically weaker, often forcing dismissal or a very favorable plea agreement. But you cannot challenge test results that do not exist. If you refuse the breathalyzer and the State obtains a warrant and takes your blood anyway, you have the same test result to challenge—plus a 12-month suspension. By submitting voluntarily, you at least avoid the guaranteed lengthy suspension while preserving all of your ability to challenge the test.

For breath test results, Arizona Revised Statutes § 28-1323 (A.R.S. § 28-1323) establishes a five-part foundation that the State must prove before breath test results are admissible:

Requirement 1: The test must have been performed using a “quantitative breath testing device approved by the department of health services or the department of public safety.” Not just any breath testing machine—it must be a specific device that has been officially approved and is on the state’s authorized list. The most common approved device is the Intoxilyzer 8000, though other devices may be approved.

Requirement 2: The person who administered the test must have “possessed a valid permit” issued by the Department of Health Services or the Department of Public Safety to operate that specific type of breath testing device at the time the test was given. Not just any officer can give the test—only officers or civilians who have been specifically trained, tested, and certified. If the operator’s permit had expired, if the operator was not properly certified for that specific device model, or if the State cannot produce documentation proving valid certification, the test may be inadmissible.

Requirement 3: Either (A) “duplicate tests were administered and the test results were within 0.02 alcohol concentration of each other” OR (B) the operator “observed the person charged with the violation for twenty minutes immediately preceding the administration of the test.” This is an either/or requirement. If duplicate tests were given and they were not within 0.02 of each other (for example, if the first test was .095 and the second was .118), the State must prove that a proper 20-minute observation period was conducted. If neither duplicate tests within tolerance nor a proper observation period can be proven, the results may be suppressed.

Requirement 4: The operator must have “followed an operational checklist approved by the department for the operation of the device.” There is an official, detailed checklist that must be followed step-by-step for each test. If the operator deviated from the checklist, if steps were skipped, if the procedure was not properly documented, this can be grounds for suppression.

Requirement 5: The device must have been “in proper operating condition” at the time the test was administered. This requires proof of calibration checks, quality assurance procedures, and maintenance records.

These requirements are further elaborated and made even more specific in the Arizona Administrative Code. Title 13, Chapter 10, Article 1 of the A.A.C. establishes detailed regulatory requirements for breath testing devices and procedures. A.A.C. R13-10-104 specifies numerous technical requirements, including:

• Duplicate breath tests must be administered “at intervals of not less than five minutes nor more than 10 minutes” (Id.)
• “Calibration Checks” of testing devices must be performed “within 31 days of each other” (Id.)
• “Quality Assurance Procedure checks” must be performed “within 90 days of each other” (Id.)
• Detailed records must be maintained documenting all calibration checks, quality assurance checks, and maintenance (Id.)

If the State cannot prove compliance with every single one of these foundational requirements, a defense attorney can file a motion to suppress the breath test results. And if the breath test results are suppressed—meaning the jury never hears what your BAC was—the State’s case for a per se DUI under A.R.S. § 28-1381(A)(2) (driving with a BAC of 0.08% or higher) essentially collapses. The State is left trying to prove the much more difficult impairment charge under § 28-1381(A)(1), which requires proof that you were impaired to the slightest degree based only on observations, without a scientific BAC number.

For blood test results, the chain of custody requirements, laboratory procedures, and qualifications of the person drawing the blood are all subject to challenge. The State must prove:

• The person who drew your blood was properly qualified and licensed
• The blood draw was performed in a sanitary manner in accordance with accepted medical standards
• The blood was placed in the proper collection tubes with the proper preservatives and anti-coagulants
• The blood was properly labeled, sealed, and stored
• An unbroken chain of custody was maintained from the moment of collection through transportation to the lab, analysis, and storage
• The laboratory that analyzed the blood was properly accredited
• The laboratory followed proper testing protocols and quality control procedures
• The equipment used to analyze the blood was properly calibrated and maintained

Every single link in this chain must be documented and proven. If any link is broken—if there is any gap in the chain of custody, any question about whether the blood was properly stored at the correct temperature, any issue with laboratory procedures—a defense attorney can challenge the reliability and admissibility of the blood test results.

The critical point is this: breath and blood test results are certainly damaging evidence, but they are not automatically admissible and they are not unchallengeable. By submitting to the test rather than refusing the breathalyzer, you create the opportunity to attack the validity of the results on technical grounds. By refusing the breathalyzer, you guarantee a 12-month suspension and still end up with test results anyway (via warrant) that are subject to the same challenges—except now you have already lost your license for a year.

Submitting to Testing Demonstrates Cooperation and Avoids Consciousness of Guilt Inference

There is one final strategic consideration that, while perhaps less legally significant than the license suspension and evidence issues discussed above, is still worth understanding: the impact of your decision on how you are perceived by prosecutors, judges, and potentially juries.

When you refuse the breathalyzer or refuse to submit to the post-arrest chemical test, you create several problems for your defense that go beyond the legal and technical:

Prosecutor perception: Prosecutors are human beings who make judgment calls about which cases to pursue aggressively and which cases to resolve with favorable plea agreements. A defendant who has refused testing is often seen as uncooperative, as someone who “had something to hide,” and as someone who was clearly aware they were too impaired to pass the test. This perception, fair or not, can make prosecutors less willing to offer favorable resolutions.

Admissibility of refusal as evidence: Arizona law explicitly permits prosecutors to introduce evidence of your refusal to submit to chemical testing at trial. The Revised Arizona Jury Instructions (Criminal) 28.1381 includes a specific instruction that judges may give to juries regarding test refusal. The instruction tells jurors that they “may consider” the fact that the defendant refused testing, though it clarifies that refusal alone is not sufficient to prove guilt.

While the instruction includes this limitation, the practical reality is that juries often view refusal negatively. Jurors frequently interpret refusing the breathalyzer as “consciousness of guilt”—the defendant refused because the defendant knew they were drunk and would fail the test. This is a powerful and damaging inference that is very difficult for a defense attorney to overcome during trial.

Judge perception during sentencing: If you are convicted after trial or enter a plea agreement, the sentencing judge will consider the facts and circumstances of your case when determining what sentence to impose within the statutory range. A defendant who cooperated with the chemical testing requirement, even though the test results were unfavorable, is often viewed more favorably than a defendant who refused the breathalyzer and was forced to provide a blood sample via warrant. Judges may view cooperation as an acceptance of responsibility and a mitigating factor in sentencing.

By submitting to the chemical test, you demonstrate a degree of cooperation with law enforcement. You show that you are not attempting to obstruct the investigation or completely refuse to participate in the legal process. You comply with what the law requires you to do under the implied consent statute, while still exercising your rights to refuse voluntary pre-arrest tests and to remain silent. This strategic balance of asserting your rights where you legally can while complying with mandatory requirements where you legally must often leads to better outcomes in DUI cases.

Section 4: The Dual-Track Penalty System—Understanding Both the Administrative and Criminal Proceedings

To fully understand the strategic framework for making decisions about whether to refuse the breathalyzer in Arizona DUI stops, you must understand that a DUI arrest in Arizona does not trigger just one legal proceeding—it triggers two completely separate and independent legal proceedings that run on parallel tracks simultaneously. These two proceedings have different legal standards, different burdens of proof, different timelines, different procedures, and different consequences. Understanding this dual-track system is absolutely essential because a favorable outcome in one track does not automatically or necessarily result in a favorable outcome in the other track.

Track One: The Administrative License Suspension Proceeding (Motor Vehicle Division)

The first track is the administrative proceeding conducted by the Arizona Department of Transportation Motor Vehicle Division, commonly referred to as ADOT MVD or simply MVD. This is a civil administrative action, not a criminal prosecution. The sole issue in this proceeding is whether your privilege to drive on Arizona roads should be suspended. That’s it. Nothing else is at stake in the MVD proceeding—not jail time, not fines, not probation, not a criminal record. Just your driver’s license.

The administrative proceeding is triggered in one of two ways:

Path A: Refusal of Chemical Test (A.R.S. § 28-1321)

If you refuse the breathalyzer or refuse to submit to the chemical test after arrest, the administrative suspension is governed by Arizona Revised Statutes § 28-1321. The suspension periods for refusing the breathalyzer are:

• First refusal within 84 months (seven years): 12 consecutive months
• Second or subsequent refusal within 84 months: 24 consecutive months

The process begins immediately at the time you refuse the breathalyzer. Pursuant to A.R.S. § 28-1321(D), the arresting officer will:

• Serve you with a written “Order of Suspension” that informs you of the suspension
• Require you to surrender your Arizona driver’s license immediately
• Issue you a temporary 30-day driving permit if you surrendered a valid Arizona license
• File a certified sworn report with the MVD within 30 days documenting the refusal

The Order of Suspension clearly states that your driving privilege will be suspended effective 30 days from the date of service. If you want to challenge this suspension and request a hearing, you must act quickly. Under A.R.S. § 28-1321(G), “The request for a hearing must be received by the department within thirty days after the date of service of the order of suspension.”

This 30-day deadline is absolute and jurisdictional. If you miss it, you lose your right to challenge the suspension entirely. The suspension goes into effect automatically and there is no opportunity for review.

Path B: Test Failure with BAC ≥ 0.08% (A.R.S. § 28-1385)

If you submit to the chemical test and the results show a blood alcohol concentration of 0.08% or higher, the administrative suspension is governed by a different statute: Arizona Revised Statutes § 28-1385, commonly called the “Admin Per Se” law. The suspension period for a first offense is:

• Not less than ninety consecutive days

The officer will serve you with an “Admin Per Se Order of Suspension” and take your license. However, unlike the refusal track, the statute does not provide for the issuance of a 30-day temporary permit in test-failure cases.

The timeline to challenge this suspension is the same as for refusal. Under A.R.S. § 28-1385(I), you have thirty days from the date the notice of suspension is served to submit a written request for a hearing to the MVD. This 30-day deadline is absolute and it is critical that you or your attorney submit the hearing request within this timeframe or the right to challenge the suspension is permanently lost.

Summary Comparison of Administrative Suspension Tracks:

The Administrative Hearing Process:

If you timely request a hearing, you will be scheduled for an administrative hearing before a hearing officer employed by the MVD. This is not a trial. There is no jury. It is not held in a courtroom. It is typically conducted by telephone or in person at an MVD office. The formalities of criminal procedure and the rules of evidence do not fully apply.

The scope of the hearing is extremely narrow and is defined by statute. For a refusal hearing under A.R.S. § 28-1321(K), the only issues that may be considered are:

1. Whether the officer had reasonable grounds to believe you were driving or in actual physical control of a motor vehicle while under the influence
2. Whether you were placed under arrest for DUI
3. Whether you refused the breathalyzer or refused to submit to the test
4. Whether you were informed of the consequences of refusing the breathalyzer

That’s the complete list. You cannot argue that the underlying traffic stop was unlawful. You cannot argue that the officer did not have probable cause to arrest you. You cannot argue about the validity or accuracy of test results (because there are no test results—you refused the breathalyzer). The hearing is limited strictly to these four factual issues.

The burden of proof in the administrative hearing is also significantly lower than in a criminal trial. The State does not have to prove its case beyond a reasonable doubt. Under the statute and MVD rules, the State must prove the relevant facts only by a “preponderance of the evidence,” which means “more likely true than not true” or “greater than 50% probability.” This is the same standard used in civil lawsuits, and it is much easier to meet than the beyond-a-reasonable-doubt standard.

The hearing officer’s decision is based on the officer’s certified sworn report, any other documents submitted, and the testimony of witnesses if any are called. In practice, the vast majority of administrative hearings are decided based solely on the paperwork, and the MVD sustains the suspension in the vast majority of cases. However, if there are procedural defects in the officer’s report, if the officer failed to properly advise you of the consequences of refusing the breathalyzer, or if other legal deficiencies exist, it is possible to win the hearing and have the suspension set aside.

Critical Point About Administrative vs. Criminal Outcomes:

This cannot be stressed enough: the outcome of the MVD administrative hearing has absolutely no binding effect on the criminal case, and the outcome of the criminal case has no binding effect on the administrative suspension. These are separate proceedings with separate standards.

You can win your MVD hearing and have the administrative suspension completely set aside, but still be convicted of DUI in criminal court and face all the criminal penalties including a separate criminal license suspension.

Conversely, you can lose your MVD hearing and serve the administrative suspension, but then be acquitted of all criminal charges at trial, have your criminal case dismissed, or successfully negotiate a reduction to a non-DUI offense like reckless driving.

The tracks are parallel and independent. You must fight both battles separately.

Track Two: The Criminal DUI Prosecution (County Attorney or City Prosecutor)

The second track is the criminal prosecution, where the State of Arizona, through the County Attorney’s Office or City Prosecutor’s Office, attempts to prove beyond a reasonable doubt that you committed the crime of driving under the influence. This is where the serious, life-altering criminal penalties come into play.

The Criminal Charges:

Depending on the specific facts of your case and your prior DUI history, you may be charged with one or more of the following criminal offenses:

A.R.S. § 28-1381: Driving or Actual Physical Control While Under the Influence (Standard DUI)

This is the basic DUI statute with two alternative theories of prosecution:

• Subsection (A)(1): “Impaired to the slightest degree” by alcohol or drugs—no specific BAC required
• Subsection (A)(2): BAC of 0.08% or greater within two hours of driving (“per se” DUI)

First offense penalties include:

• Minimum 10 days in jail (9 days may be suspended with alcohol screening/classes)
• Fines and assessments typically totaling $2,500-$4,500
• License suspension (in addition to any administrative suspension)
• Mandatory alcohol/drug screening, education, and treatment
• Community service
• Ignition interlock device for 12 months
• Probation

A.R.S. § 28-1382: Driving While Under the Extreme Influence

If your BAC is 0.15% or higher, you can be charged with Extreme DUI in Arizona, which carries significantly harsher penalties. For even higher BAC levels, Arizona recognizes Super Extreme DUI penalties with even more severe consequences.

First offense Extreme DUI penalties (BAC 0.15% to 0.199%):

• Minimum 30 days in jail (21 days suspended upon completion of alcohol screening/education; of the 9 days served: 2 days in custody and 7 days may be served on home detention with electronic monitoring)
• Fines and assessments typically totaling $3,500-$5,500 or more
• All other DUI penalties apply

First offense Super Extreme DUI penalties (BAC 0.20% or higher):

• Minimum 45 days in jail (31 days suspended upon completion of alcohol screening/education; of the 14 days served: 3 days must be in custody and 11 days may be served on home detention with electronic monitoring)
• Fines and assessments typically totaling $4,000-$6,000 or more
• All other DUI penalties apply

A.R.S. § 28-1383: Aggravated Driving or Actual Physical Control While Under the Influence

Aggravated DUI is a Class 4 Felony and applies if:

• You are on your third DUI offense within 84 months (7 years)
• You are arrested for DUI while your license is suspended, revoked, or restricted
• You are arrested for DUI with a person under 15 years old in the vehicle
• You are required to have an ignition interlock device but are driving a vehicle without one
• You commit a DUI while driving the wrong way on a highway

For details on aggravated DUI for driving the wrong way, including the severe felony penalties and enhanced consequences, see that comprehensive analysis of this particularly dangerous form of impaired driving.

Felony Aggravated DUI carries:

• Mandatory minimum prison sentence (typically 4 months to several years depending on prior record and specific circumstances)
• Loss of voting rights and gun ownership rights
• Permanent felony criminal record
• Revocation of driving privilege
• All other consequences of a DUI conviction

The Criminal Burden of Proof and Procedures:

Unlike the administrative hearing where the State only needs to prove its case by a preponderance of the evidence, in the criminal prosecution the State must prove every element of the offense beyond a reasonable doubt. This is the highest burden of proof in the American legal system. It does not mean absolute certainty or proof beyond all possible doubt, but it means the evidence must be so convincing that a reasonable person would not hesitate to rely on it in making the most important decisions in their own life.

You have substantial constitutional rights in the criminal case that do not exist in the administrative proceeding:

• The right to a jury trial
• The right to confront and cross-examine witnesses
• The right to subpoena witnesses and evidence
• The right to remain silent and not testify
• The right to be represented by an attorney
• The requirement that the State prove guilt beyond a reasonable doubt

This is where your decision to refuse the breathalyzer at roadside testing and submit to post-arrest chemical testing pays strategic dividends. The State must prove its case using only admissible evidence obtained lawfully. By refusing roadside tests, you denied the State video evidence of FST performance and your statements about drinking. By submitting to the chemical test (rather than refusing the breathalyzer and getting a warrant anyway), you avoided the 12-month suspension while still preserving the ability to challenge the test’s validity on technical grounds.

If your attorney can successfully challenge the admissibility of the breath or blood test results based on violations of A.R.S. § 28-1323 or the administrative code requirements, the State’s case becomes dramatically weaker. Without a BAC number, the prosecution must rely entirely on the officer’s observations—which are inherently subjective and easier to challenge on cross-examination than a scientific test result.

Many DUI cases are resolved through plea negotiations rather than trial. If the State’s evidence is weak—because you refused the breathalyzer at roadside and refused to provide voluntary evidence through pre-arrest testing—the prosecutor may be willing to negotiate a reduction to a lesser offense such as Reckless Driving under A.R.S. § 28-693. A reckless driving conviction does not carry the mandatory jail time, ignition interlock requirements, or long-term license consequences of a DUI. It is a misdemeanor traffic offense rather than a DUI. While still serious, it is infinitely preferable to a DUI conviction.

Section 5: What You Must Do and Must Not Do at a DUI Stop

Knowing the law is only useful if you can execute the strategy correctly in the high-pressure environment of a traffic stop. Here is the precise roadmap for what to do—and what not to do—when stopped for suspected DUI in Arizona and facing the question of whether to refuse the breathalyzer.

Phase 1: The Traffic Stop Itself

What You MUST Do:

1. Pull over safely and promptly when signaled by law enforcement.
2. Turn off your vehicle and place your hands on the steering wheel where the officer can see them.
3. Be polite and respectful at all times.
4. Provide your driver’s license, vehicle registration, and proof of insurance when requested. A.R.S. § 28-1595 requires you to provide these documents during a lawful traffic stop.

What You MUST NOT Do:

1. Do not volunteer information. Do not tell the officer where you are coming from, where you are going, or what you have been doing.
2. Do not answer the question, “Have you been drinking tonight?” or “How much have you had to drink?”
3. Do not make excuses or explanations for your driving.

What to Say:

• “Officer, I am going to respectfully exercise my right to remain silent. I will not answer questions without my attorney present.”
• “Here is my license, registration, and insurance.”

Phase 2: Roadside Testing Requests (The First “Refuse the Breathalyzer” Decision)

When the officer asks you to perform Field Sobriety Tests:

What You MUST Say:

• “Officer, I respectfully decline to perform field sobriety tests.”

What You MUST NOT Do:

• Do not agree to perform FSTs under any circumstances.
• Do not let the officer convince you that “refusing will make things worse” or that “cooperating will help you.”

When the officer asks you to blow into a Portable Breath Test (handheld device at roadside):

What You MUST Say:

• “Officer, I respectfully decline to take a preliminary breath test.”

What You MUST NOT Do:

• Do not blow into the handheld device. Refuse the breathalyzer at this stage.

Important: The officer may tell you that refusal will result in consequences. For roadside tests (FSTs and PBT), this is incorrect. There are no legal consequences for refusing the breathalyzer or other voluntary investigative tools before arrest.

Phase 3: The Arrest

If the officer decides to arrest you based on their observations and your refusal of voluntary tests, they will place you under arrest for DUI. At this point, do not resist. Comply with all lawful orders.

What to Say:

• “I am invoking my right to remain silent. I would like to speak to an attorney.”

What You MUST NOT Do:

• Do not answer any further questions about drinking, drug use, or your activities.
• Do not make any statements, even if you believe they will help you.

Phase 4: Post-Arrest Chemical Testing (The Second Decision—Do NOT Refuse the Breathalyzer)

You will be transported to a police station, DUI processing center, or mobile testing unit. The officer will read you the Admin Per Se/Implied Consent Advisory, which informs you of the consequences of refusing the breathalyzer under A.R.S. § 28-1321(B). The officer will then request that you submit to a chemical test (breath or blood).

What You MUST Do:

1. Submit to the chemical test. This is the critical moment where you must NOT refuse the breathalyzer in Arizona DUI stops after arrest.
2. If offered a choice between breath and blood, generally choose breath (it is less intrusive and the results can be challenged on more technical grounds).
3. Cooperate fully with the testing process and follow the operator’s instructions.

What You MUST NOT Do:

• Do not refuse the breathalyzer test after arrest.
• Do not attempt to argue with the officer or operator.
• Do not try to delay or interfere with the testing process.

What to Say:

• “I will submit to the test as required by law.”
• Continue to assert: “I am invoking my right to remain silent and I want to speak with my attorney.”

Phase 5: After the Test

Once the test is complete, the officer will either release you to a sober person or book you into jail. If you are released, you will be given paperwork that includes:

1. A citation or complaint for DUI charges.
2. An Order of Suspension (if you failed the chemical test with BAC ≥ 0.08% or if you refused the breathalyzer) or notice of administrative action.
3. A temporary driving permit (if applicable).

What You MUST Do:

1. Read all paperwork carefully and note the dates.
2. You have 30 days to request an administrative hearing – this deadline applies to both refusal cases (A.R.S. § 28-1321) and test failure cases (A.R.S. § 28-1385).
3. Contact a DUI defense attorney immediately. Time is critical for preserving your rights and requesting an MVD hearing.

Section 6: Special Populations and Heightened Consequences

While the Two-Test Rule—refuse the breathalyzer before arrest, submit after arrest—applies to all drivers, certain categories of individuals face heightened scrutiny and more severe consequences under Arizona law.

Commercial Driver’s License (CDL) Holders

For those who drive for a living, a DUI arrest can mean the end of a career. A.R.S. § 28-3312 (A.R.S. § 28-3312) imposes strict standards and disqualifications for CDL holders:

• Lower BAC Threshold: A CDL holder operating a commercial vehicle is subject to DUI if their BAC is 0.04% or higher (A.R.S. § 28-3312(A)), half the standard threshold.
• Mandatory Disqualification: A first DUI offense (even in a personal vehicle) results in a minimum one-year CDL disqualification (A.R.S. § 28-3312(B)(1)).
• Lifetime Disqualification: A second DUI offense results in a lifetime CDL disqualification (A.R.S. § 28-3312(B)(2)).

For CDL holders, the stakes are even higher, making the strategic approach to whether to refuse the breathalyzer in Arizona DUI stops essential. By refusing roadside tests and submitting to chemical testing after arrest, a CDL holder maximizes the chance of challenging the BAC result or negotiating a reduction to a non-DUI offense that does not carry automatic disqualification.

Drivers Under Age 21

Arizona enforces a zero-tolerance policy for underage drinking and driving. A.R.S. § 4-244(34) (A.R.S. § 4-244(34)) makes it illegal for a person under 21 to drive or be in physical control of a vehicle “while there is any spirituous liquor in the person’s body” (Id.).

Arizona’s underage DUI laws are covered in detail in that comprehensive resource, explaining how even trace amounts of alcohol can result in serious consequences for drivers under 21.

A.R.S. § 28-1321(A)(2) explicitly triggers the implied consent law if an officer has reasonable grounds to believe a person under 21 was driving with “spirituous liquor in the person’s body” (Id.). This means any detectable amount of alcohol—even 0.01%—can result in administrative penalties and criminal charges.

For underage drivers, the Two-Test Rule remains applicable. Refusing the breathalyzer at roadside tests avoids creating additional evidence of alcohol consumption (such as FST performance or PBT results). Submitting to the post-arrest chemical test is still required to avoid the 12-month refusal suspension, but the result can be challenged based on testing procedures and potential contamination or error.

Out-of-State Drivers

Non-residents are not exempt from Arizona’s DUI laws or the consequences of refusing the breathalyzer. If an out-of-state driver refuses a chemical test, their privilege to drive within Arizona will be suspended, and under A.R.S. § 28-1321(O) (A.R.S. § 28-1321(O)), ADOT is required to “give information either in writing or by electronic means of the action taken to the motor vehicle administrator of the state of the person’s residence and of any state in which the person has a license” (Id.).

Through the Interstate Driver’s License Compact, most states will honor Arizona’s suspension and impose corresponding penalties in the driver’s home state. An Arizona DUI arrest can therefore result in license suspension in your home state, loss of employment, and difficulty obtaining insurance.

Section 7: The Statistical Reality Driving Arizona’s DUI Enforcement

Arizona’s aggressive DUI enforcement and harsh penalties are a direct response to the state’s traffic safety crisis. Understanding the data helps explain why officers are trained to maximize evidence collection and why prosecutors pursue DUI cases vigorously, making the question of whether to refuse the breathalyzer all the more critical.

The Death Toll on Arizona Roads

According to the Arizona Department of Transportation’s 2024 Motor Vehicle Crash Facts report (ADOT 2024 Motor Vehicle Crash Facts, pp. 1-3), Arizona recorded 1,228 traffic fatalities in the most recent year of data (Id. at p. 1). The human cost is staggering:

• An average of 3.36 persons were killed each day (Id. at p. 2)
• This translates to one person killed every 7 hours and 9 minutes (Id.)

Alcohol’s Disproportionate Role in Fatal Crashes

While alcohol-related crashes accounted for only 4.56% of total crashes in Arizona (ADOT 2024 Crash Facts, p. 15), they represented a massively disproportionate 27.93% of all fatal crashes (Id. at p. 16). Alcohol-related collisions are not just more common—they are exponentially more deadly.

The data shows (Id. at pp. 15-17):

• Total Alcohol-Related Crashes: 5,520
• Fatal Alcohol-Related Crashes: 312
• Persons Killed in Alcohol-Related Crashes: 347

Aggressive Enforcement Campaigns

In response to these statistics, Arizona law enforcement conducts high-visibility DUI enforcement operations, particularly around holidays. During the 2025 Labor Day enforcement period, according to the Governor’s Office of Highway Safety (GOHS 2025 Labor Day Report), Arizona officers made 385 DUI arrests (Id.) in a matter of days, with the average known BAC at 0.151% (Id.)—nearly twice the legal limit. Officers conducted 5,972 traffic stops (Id.) with 1,030 officers (Id.) from 54 agencies (Id.) participating.

This data underscores why you must be prepared for a DUI stop and understand when to refuse the breathalyzer (before arrest) versus when you must submit (after arrest). Arizona officers are trained, equipped, and incentivized to make DUI arrests. The roadside encounter is not a casual interaction—it is a choreographed evidence-collection operation.

Historical Traffic Safety Trends

According to the Arizona Department of Public Safety (DPS Impaired Driving Report 2024), “from 2014 to 2024, Arizona’s traffic fatalities increased 62%, and the fatality rate per 100 million vehicle-miles traveled (VMT) rose 29%” (Id.). This increase resulted in Arizona having the fourth-highest fatality rate in the nation at 1.59 per 100 million VMT (Id.), a statistic that continues to fuel the state’s aggressive enforcement posture.

Section 8: The Right to Counsel—Limited but Important

One final consideration in deciding whether to refuse the breathalyzer is your right to consult with an attorney. While the Sixth Amendment right to counsel attaches at criminal proceedings, Arizona law recognizes a limited right to contact an attorney before deciding whether to submit to a chemical test.

The Carrillo Decision

In Carrillo v. Houser, 224 Ariz. 463 (2010) (Carrillo, 224 Ariz. at 463), the Arizona Supreme Court addressed whether DUI suspects have a right to consult with counsel before deciding whether to take a chemical test. The court held that such a right exists, but it is not absolute and cannot be used to delay or obstruct the testing process (Id. at 469).

The court stated that an individual “has a limited right to consult with counsel before deciding whether to submit to testing,” but this right must be balanced against “the state’s interest in the timely and efficient collection of evidence” (Id.). If a suspect makes a reasonable, good-faith effort to contact counsel and is unable to do so, that does not excuse refusing the breathalyzer. The officer is not required to provide unlimited time or extraordinary efforts to facilitate attorney contact (Id. at 470).

Practical Application

If you invoke your right to counsel during the post-arrest chemical testing phase:

1. Be specific: “I would like to call my attorney before I make a decision about the test.”
2. Be reasonable: If you are given an opportunity to make a phone call and cannot reach an attorney, you will still be required to decide about the test.
3. Do not use this as a delay tactic: Officers are trained to recognize bad-faith delay attempts, and if you refuse the breathalyzer after a reasonable opportunity to contact counsel, your refusal will be treated the same as any other refusal.

Strategic Note: Given that the Two-Test Rule dictates that you should submit to the chemical test anyway, the right to counsel in this phase is of limited practical value. You should already know your decision before you are arrested: you will submit to the test and NOT refuse the breathalyzer. Invoking the right to counsel does not change this strategic imperative.

Section 9: Conclusion—Knowledge is Your Defense

Should you refuse the breathalyzer in an Arizona DUI stop? The answer is nuanced and depends entirely on which test you’re being asked to take. Arizona’s DUI laws create a legal minefield where a single wrong answer to an officer’s question—or the wrong decision about whether to refuse the breathalyzer—can result in a year without a license, a criminal record, and thousands of dollars in fines and fees. The Two-Test Rule is not a trick or a loophole—it is a strategic exercise of your constitutional rights within the framework of Arizona law.

To summarize the strategic approach to refusing the breathalyzer:

ALWAYS REFUSE (Pre-Arrest):

• Preliminary Breath Tests (PBT) / Portable Breath Tests (handheld roadside devices) — refuse the breathalyzer at this stage
• Field Sobriety Tests (FSTs)
• Questions about drinking, drug use, or your activities (beyond providing your name, license, registration, and insurance)

ALWAYS SUBMIT (Post-Arrest):

• Post-arrest chemical tests (evidentiary breath test or blood test conducted after arrest at a police station or processing center) — do NOT refuse the breathalyzer after arrest

ALWAYS PROVIDE:

• Your true and accurate name
• Driver’s license
• Vehicle registration
• Proof of insurance

NEVER PROVIDE:

• Incriminating statements
• Voluntary physical evidence (FST performance)
• Voluntary chemical evidence (PBT at roadside)

This strategy is rooted in the constitutional protections afforded by the Fourth and Fifth Amendments, the statutory framework of Arizona’s Implied Consent Law, and the practical realities of defending a DUI case. By refusing the breathalyzer and other tests at roadside, you minimize the evidence the state can use against you. By submitting to the post-arrest chemical test, you avoid a catastrophic 12-month administrative suspension and preserve your ability to challenge the test results on technical and procedural grounds.

The law does not require you to help the state build its case against you. You have the right to remain silent, the right to refuse the breathalyzer before arrest, and the right to make the state prove its case using only the evidence it is legally entitled to collect. Understanding when to refuse the breathalyzer in Arizona DUI stops—and when you must submit—is the difference between a defensible case and a legal disaster.

If you are arrested for DUI despite following the Two-Test Rule on whether to refuse the breathalyzer, contact an experienced Arizona DUI defense attorney immediately. Time is critical. You have only 30 days to request an MVD hearing whether you refused the breathalyzer or took and failed the chemical test. An attorney can analyze the officer’s reports, challenge the validity of the chemical test, identify procedural violations, and build a defense strategy tailored to your case.

To explore your best legal strategies and common DUI defenses in Arizona, visit that comprehensive resource to understand all available options for fighting your charges.

The Two-Test Rule does not guarantee you will avoid a DUI conviction, but it ensures you will face that fight on the best possible legal footing—with your license intact, your rights preserved, and the state’s burden of proof as heavy as the law allows.