Arizona DUI Causing Death Lawyers
Facing charges after a fatal DUI crash in Arizona? A death involving impaired driving is charged as manslaughter, negligent homicide, or second-degree murder, with aggravated DUI stacked on top, exposure runs from 4 to 25 years. Do not talk to police and do not consent to a blood draw without counsel.
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Is There a DUI Causing Death Law in Arizona?
Quick answer: In Arizona there is no single “DUI causing death” statute. A fatal impaired-driving crash is charged as negligent homicide, manslaughter, or second-degree murder depending on the driver’s mental state, with aggravated DUI (A.R.S. § 28-1383) stacked on top. Exposure ranges from 4 years to 25 years. The defense attacks the stop, the blood draw, causation, and the charge level.
Both Sides
Former Prosecutors · Law Enforcement · Public Defenders
When you call Tamou Law Group, you reach a firm that handles criminal defense exclusively, with serious experience defending DUI causing death and other homicide cases across Arizona. Our team includes former prosecutors and law enforcement officers, so we know exactly how the State builds these cases, and where they fall apart.
At many large firms, the name on the building is a marketing figurehead, you rarely get them on the phone and your case goes to a junior associate. When you hire Tamou Law Group, your case is handled by a full team of attorneys, not associates, including Michael Tamou.
On This Page
- Is There a DUI Causing Death Law in Arizona?
- What felony is a DUI causing death in Arizona?
- What is the sentence for a fatal DUI, and is prison mandatory?
- When is a fatal DUI charged as second-degree murder instead of manslaughter?
- How does the State prove impairment and that it caused the death?
- What are the strongest defenses to a DUI causing death charge?
- Can a DUI causing death charge be reduced to a lesser homicide?
- Negligence vs. Recklessness vs. Murder
- Penalties & Sentencing
- Defenses That Work
- Our Defense Team
- FAQs
If you’ve been charged with DUI causing death in Arizona, you probably have urgent questions about what you’re facing and what comes next. Here are straight answers to the questions people ask most, with a plain-English breakdown of the law under A.R.S. § 28-1383, the penalties, and the defenses that matter most.
What felony is a DUI causing death in Arizona?
Arizona has no single “DUI causing death” statute. A fatal impaired-driving crash is charged as a homicide — negligent homicide (Class 4), manslaughter (Class 2), or second-degree murder (Class 1) — with aggravated DUI (A.R.S. § 28-1383) stacked on top. The homicide class depends on your mental state, and most of these are charged as dangerous offenses.
Awards & Recognition
Our recognition for Phoenix homicide defense is independently verified, click any award to confirm it:
- National Trial Lawyers Top 100
- National Trial Lawyers Top 40 Under 40
- Elite Lawyer 2026 – Criminal Defense
- Super Lawyers – Southwest
- National College for DUI Defense (NCDD)
When you are looking for the best Phoenix homicide lawyers, these are the independently verified credentials that matter, earned by Founding Attorney Michael Tamou and a full team of attorneys, including former prosecutors.
What is the sentence for a fatal DUI, and is prison mandatory?
The penalty tracks whichever homicide charge the State proves: roughly 4 to 8 years for negligent homicide, 7 to 21 years for manslaughter, and 10 to 25 years for second-degree murder, with aggravated DUI penalties added on top. The manslaughter and murder levels carry mandatory, largely flat-time prison, so the charge level decides everything.
When is a fatal DUI charged as second-degree murder instead of manslaughter?
The State pushes a fatal DUI up to second-degree murder when it can argue extreme indifference to human life — typically a very high BAC, prior DUI convictions, or wrong-way driving. Manslaughter requires only recklessness, so defeating the extreme-indifference theory is usually the central goal and can cut the exposure by more than a decade.
How does the State prove impairment and that it caused the death?
The State relies on the blood draw and BAC, officer observations, and accident reconstruction to tie impairment to the crash. It must prove both that you were impaired and that your driving — not another driver or an intervening event — caused the death. Both links are contestable, and undercutting either weakens the entire case.
What are the strongest defenses to a DUI causing death charge?
The most effective defenses attack the blood draw — the warrant, chain of custody, and rising-BAC science — along with causation and the charge level. Because the DUI is the foundation of the case, suppressing an unlawful stop or defective blood test can collapse the homicide charge built on top of it.
Can a DUI causing death charge be reduced to a lesser homicide?
Yes. By defeating the extreme-indifference theory, a case can move from second-degree murder down to manslaughter, and by defeating recklessness it can move from manslaughter to negligent homicide. Where causation or impairment cannot be proven, the homicide charge can be reduced further or dismissed.
Negligence vs. Recklessness vs. Murder
In a fatal crash, the driver’s mental state determines the charge, and the charge determines whether you face probation or decades in prison.
| Driver’s Mental State | Charge | Statute | Felony Class | Prison Range |
|---|---|---|---|---|
| Criminal negligence (should have known the risk) | Negligent Homicide | 13-1102 | Class 4 (dangerous) | 4–8 years |
| Recklessness (knew and disregarded the risk) | Vehicular Manslaughter | 13-1103 | Class 2 (dangerous) | 7–21 years |
| Extreme indifference to human life | Second-Degree Murder | 13-1104 | Class 1 | 10–25 years |
Ranges shown are for a first offense. Moving a case down even one rung on this ladder can mean years, or decades, of difference.
What the State Must Prove for DUI Causing Death
To convict you of DUI Causing Death under A.R.S. § 28-1383, the prosecutor must prove every one of these elements beyond a reasonable doubt. If even one fails, the charge fails.
- 1Impairment (the DUI). You were driving under the influence, with a BAC of .08 or more, or impaired to the slightest degree by alcohol or drugs.
- 2Causation. Your driving, not another driver or an intervening event, actually caused the death.
- 3A resulting death. Another person died as a result of the crash.
- 4The homicide mental state. Negligence, recklessness, or extreme indifference, which determines whether the charge is negligent homicide, manslaughter, or second-degree murder.
Examples of Conduct Charged as DUI Causing Death
- A fatal crash with a driver BAC over .08
- A fatal crash involving drug or prescription-medication impairment
- A high-BAC or repeat-DUI fatal crash charged as second-degree murder
- A wrong-way or extreme-speed impaired-driving collision
What Sentence Could You Actually Face?
A fatal DUI is sentenced under whichever homicide charge the State proves, negligent homicide (4–8 years), manslaughter (7–21 years flat), or second-degree murder (10–25 years), with aggravated DUI penalties added on top. The charge level decides everything.
Class 4
Negligent Homicide
Class 2
Vehicular Manslaughter
Class 1
Second-Degree Murder
⚠ “Dangerous Offense” Means Flat Time
A dangerous-offense designation under A.R.S. § 13-704 removes probation as an option and requires the sentence to be served day-for-day, with no “good time” release. That is why fighting the charge level and the dangerous designation, not just the facts, is the core of the defense.
Arizona DUI Penalty Estimator
Want the full out-of-pocket cost (insurance, interlock, attorney)? Try the Arizona DUI Cost Calculator.
How We Fight Arizona DUI Causing Death Cases
Every case has weak points. These are the defenses we look at first.
Attacking Causation & the Crash
Lack of Causation. The State must prove your driving, not another factor, caused the death. A third driver, the decedent’s own conduct, or an intervening event can break the chain.
Faulty Accident Reconstruction. Police reconstructions are often wrong on speed, point of impact, or timing. Our independent experts frequently reach the opposite conclusion.
Unavoidable Accident. If a reasonable driver could not have prevented the crash, there is no crime, only a tragedy.
Mechanical Failure or Road Conditions. Brake failure, tire blowouts, defective design, or hazardous road and weather conditions can be the true cause.
Sudden Medical Emergency. An unforeseeable seizure, stroke, or cardiac event at the wheel negates the culpable mental state.
Attacking Mental State & the Evidence
Accident, Not Recklessness. Manslaughter requires recklessness, a conscious disregard of a substantial risk. Ordinary negligence or a momentary lapse is not enough, and can defeat or reduce the charge.
Fighting the Charge Level. We work to move the charge down the ladder, from second-degree murder to manslaughter, or from manslaughter to negligent homicide, cutting the prison exposure sharply.
Blood Draw & BAC Challenges. Where DUI is alleged, we challenge the warrant, the draw, lab procedure, and rising-BAC science used to prove impairment at the time of driving.
Unlawful Stop, Search & Statements. Evidence and admissions obtained through constitutional violations, or without Miranda, can be suppressed.
Event Data Recorder Disputes. “Black box” data can be misread or incomplete. We bring in EDR analysts to test what it really shows.
The Experts We Bring to DUI Cases
A DUI is a science case. We bring the specialists who take the State’s numbers apart, click any to see how.
Forensic Toxicologists
BAC & Absorption
Independently review the blood and breath results, the absorption curve, and whether the alleged number reflects your true level at the time of driving.
Breath-Test Analysts
Intoxilyzer & Calibration
Examine the machine’s calibration and maintenance logs and the 15-minute observation, exposing mouth alcohol, radio interference, and operator error that inflate readings.
Blood & Lab Experts
Gas Chromatography
Audit the blood draw, storage, fermentation risk, lab protocol, and reported uncertainty, where applying the margin of error can drop the reading below the threshold.
Medical Experts
GERD, Diabetes & Diet
Explain how acid reflux, diabetes, and low-carb diets can push a breath reading upward, independent of how much alcohol was actually consumed.
Field Sobriety Experts
NHTSA Protocol
Evaluate whether the standardized field sobriety tests were administered and scored correctly, and whether the “clues” really show impairment.
Records & Discovery Specialists
Maintenance & Logs
Pull the full calibration history, repair records, and the discovery the State would rather not produce, the paper trail that often reveals an unreliable machine.
Recent DUI Causing Death Defense Results
Every case is unique and results depend on the facts, but these examples reflect how our firm handles DUI causing death cases across Arizona.
Fatal DUI Charged as Second-Degree Murder
Reduced to Manslaughter
By attacking the ‘extreme indifference’ theory and the rising-BAC science, we moved a second-degree murder charge down to manslaughter, avoiding a 25-year exposure.
Aggravated DUI + Manslaughter
Charges Reduced
A defective blood draw and chain-of-custody gaps weakened the DUI core of the case, leading to a reduced charge and a sentence well below the presumptive term.
Fatal DUI, Disputed Causation
Charges Dismissed
Reconstruction established another driver caused the fatal collision. After we presented the evidence, the homicide charge was dismissed.
Fatal DUI, Causation Disputed
Charges Reduced
An independent reconstruction showed another driver caused the collision, reducing the homicide charge.
High-BAC Fatal Crash
Murder Reduced to Manslaughter
We defeated the ‘extreme indifference’ theory, avoiding a 25-year exposure.
Fatal DUI, Blood Warrant Defect
Charges Reduced
A defective blood warrant undercut the impairment evidence and the charge level.
What Clients Say About Tamou Law
Real Google reviews from clients we have defended across Phoenix and Maricopa County. Every review is from a criminal defense client, never padded with non-legal work.
Clients reach us searching in many ways, for the best DUI causing death lawyer in Arizona, for lawyers who handle DUI causing death charges, or for Phoenix DUI causing death defense and a Scottsdale DUI causing death attorney. Our Phoenix criminal defense lawyers and Scottsdale criminal defense attorneys defend DUI causing death and other homicide cases across Phoenix, Scottsdale, Mesa, Tempe, Chandler, Gilbert, Glendale, Peoria, and all of Maricopa County, from offices in both cities. This page is part of our Arizona violent crimes practice. Call 623-321-4699 or contact our team for a free, confidential consultation, 24/7.
Arizona DUI Causing Death FAQs
Quick answers to the questions we hear most about DUI causing death charges, penalties, and defenses in Arizona.
Is there a DUI causing death law in Arizona?
There is no single statute. A fatal impaired-driving crash is charged as negligent homicide (A.R.S. 13-1102), manslaughter (A.R.S. 13-1103), or second-degree murder (A.R.S. 13-1104) depending on the driver’s mental state, with aggravated DUI (A.R.S. 28-1383) charged on top.
Can a fatal DUI be charged as murder in Arizona?
Yes. With a very high BAC, prior DUIs, or wrong-way driving, the State may allege extreme indifference to human life and charge second-degree murder (10 to 25 years). Defeating that theory to reduce it to manslaughter is often the central goal.
What are the penalties for a fatal DUI in Arizona?
They depend on the homicide charge proved: negligent homicide is 4 to 8 years, manslaughter 7 to 21 years (flat time), and second-degree murder 10 to 25 years, with aggravated DUI penalties added on top.
Is a fatal DUI a dangerous offense with flat time?
When charged as manslaughter, yes, because the vehicle is a dangerous instrument, so prison is mandatory and served day-for-day with no early release. The exact exposure tracks the homicide charge level.
Can the DUI or blood test be challenged in a fatal-crash case?
Yes, and it is central to the defense. We challenge the stop, the warrant, the blood draw, chain of custody, and rising-BAC science. Undercutting the DUI core weakens the entire homicide case.
What if drugs or prescription medication, not alcohol, were involved?
Arizona’s DUI law covers impairment by any drug, including prescription medication. The same homicide framework applies, and we challenge the impairment evidence and whether it actually caused the crash.
Can a fatal DUI charge be reduced or dismissed?
Yes. Through challenges to causation, the charge level (murder down to manslaughter), and suppression of an unlawful stop, search, or blood draw, the charge can be reduced or, where causation fails, dismissed.
Will I lose my driver’s license?
Aggravated DUI carries a license revocation through the MVD that is separate from the criminal case. We address both the criminal exposure and the license consequences.
Will the victim’s family sue me too?
Usually, yes. A fatal crash typically triggers a civil wrongful-death lawsuit in addition to the criminal case, so coordinated defense matters.
Should I consent to a blood draw or talk to police?
No. You can require a warrant for a blood draw, and you should politely decline questions and ask for a lawyer. Do not admit to drinking or to fault.
Will I get a real attorney or a junior associate?
At many large firms the name on the door is a figurehead and your case goes to a rotating associate. At Tamou Law Group your defense is handled by a full team of experienced attorneys, not associates, including founding attorney Michael Tamou. Call 623-321-4699, 24/7.
Key Takeaways
- A fatal DUI crash is charged as negligent homicide, manslaughter, or second-degree murder, plus aggravated DUI (A.R.S. § 28-1383).
- Exposure depends on the homicide charge: 4–8 years (negligent homicide) up to 10–25 years (second-degree murder), most of it flat time.
- The State uses a high BAC or prior DUIs to push the charge up toward second-degree murder; we fight to keep it at manslaughter or lower.
- Blood-draw, warrant, chain-of-custody, and rising-BAC challenges can undercut the DUI core of the entire case.
- The strongest defenses attack causation, the charge level, and the State’s reconstruction and toxicology.
- Your case is handled by a full team of attorneys, not associates, including Michael Tamou, available 24/7 at 623-321-4699.
Two Arizona Offices, One Team
We serve all of Maricopa County and the surrounding area, with free, confidential consultations 24/7 by phone and in-person meetings at either office by appointment.
Case Results Disclaimer: The results described on this page are based on specific facts and circumstances and do not guarantee or predict a similar outcome in any future case. Every case is different. Past results do not guarantee future results. No attorney-client relationship is formed by viewing this page or submitting a contact form until a written fee agreement has been signed. Tamou Law Group, PLLC is licensed to practice law in the State of Arizona. This website is for informational purposes only and does not constitute legal advice.