Phoenix Felony DUI Lawyer
Former Maricopa County Prosecutor. Personal Representation. Every Case.
A felony DUI charge moves your case out of city court and into Maricopa County Superior Court, where the Maricopa County Attorney’s Office takes over the prosecution. That shift changes everything: the stakes, the procedures, and the level of defense you need. I know how that office builds felony drunk driving cases because I prosecuted them. Before founding The Koplow Law Firm in 2005, I worked in the Vehicular Crimes Section of the Maricopa County Attorney’s Office, the same division that handles these prosecutions today.
That insider knowledge isn’t a talking point. It shapes how I read a charging document, how I assess what the state values in a negotiation, and where I look for the gaps they don’t advertise. With more than 25 years of criminal law experience, over 300 jury trials, and a depth of forensic training that I regularly teach to other attorneys across Arizona and nationally, I bring a level of preparation to felony DUI defense that many defendants don’t get from a single attorney.
When you hire this firm, you hire me. Not a junior associate. I handle your case personally from the first consultation through resolution, and I offer free consultations, 24/7 availability, and virtual meetings for clients who need flexibility.
Call (602) 560-7837 or contact me online today to schedule a free consultation. I meet with clients both in person and through video conference.
What Makes a DUI a Felony in Arizona
Under A.R.S. § 28-1383, Arizona’s aggravated DUI statute, a DUI becomes a felony when any one of five triggering circumstances applies. Blood alcohol content alone doesn’t determine felony status. A driver can face aggravated DUI charges at any BAC level if one of these conditions is present.
The five circumstances that trigger an aggravated felony DUI charge are:
- Suspended, revoked, canceled, or restricted license: Driving while impaired on a license that was already suspended or restricted at the time of the offense.
- Third DUI within 84 months: A third DUI offense occurring within 84 months of the first offense date.
- Child passenger under 15: A passenger younger than 15 years old was in the vehicle at the time of the offense.
- Ignition interlock violation: The driver was under a court order requiring an ignition interlock device and was driving a vehicle without one installed.
- Wrong-way driving while impaired: Operating a vehicle the wrong way on a highway while impaired.
Felony Class & Sentencing Exposure
The first four circumstances involving a suspended license, a third offense within 84 months, an ignition interlock violation, and wrong-way driving are charged as Class 4 felonies, carrying a mandatory minimum of four months in the Arizona Department of Corrections. A child passenger under 15 is a Class 6 felony, with mandatory prison exposure of up to two years.
One consequence sets a felony DUI apart from every other DUI conviction: it is forever allegeable. An aggravated DUI conviction under A.R.S. § 28-1383 can be used as a prior felony in any future felony proceeding, no matter how many years pass. A misdemeanor DUI is only allegeable within seven years. Arizona doesn’t expunge felony DUI convictions. A set-aside under A.R.S. § 13-905, which allows a court to dismiss the judgment after sentence completion, is available, but the conviction still appears on your record marked as set aside, not erased.
The Consequences of a Felony DUI Conviction
The prison exposure and license consequences are serious enough on their own. What follows a felony drunk driving conviction in the years after sentencing is a separate category of harm.
- Loss of civil rights: A felony DUI conviction results in the loss of the right to vote and the right to own or purchase firearms. These rights don’t restore automatically and often require separate legal steps after the sentence is completed.
- Employment challenges: Many employers conduct background checks and may disqualify applicants with felony convictions. Licensed professions including teaching, healthcare, real estate, and finance impose their own board-level restrictions that can end or redirect a career.
- Housing barriers: Landlords commonly screen for felony convictions, and public housing programs impose their own restrictions, limiting options significantly.
- Social burden: Being labeled a felon strains personal relationships and creates long-term barriers to community reintegration. The weight of that label doesn’t lift when the sentence ends.
- Financial consequences: Elevated insurance rates, limited access to credit, and employment-related income loss can persist for years after a felony DUI conviction.
See How We’ve Helped Others
Trusted by Clients Across Arizona
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"Great trial attorney."
Lawrence is tenacious, relentless, and extremely passionate about his clients and their cases. He leaves no stone unturned in his investigations, and his cross examinations are grueling. His knowledge of the science of DUI's and the testing procedures is unsurpassed. Great trial attorney.
- Jesse S. -
"Unquestionably one of the top DUI/ criminal defense attorneys in Arizona."As a practicing attorney in DUI and criminal defense, and as a former prosecutor who went against Lawrence on several cases, I can attest that the State knows they will have their hands full when Lawrence is on the case.- Ryan M.
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"You cannot go wrong with Lawrence."
Great attorney! Lawrence thinks outside the box and goes above and beyond for his clients and the legal community at large. If you are looking for aggressive representation, you cannot go wrong with Lawrence.
- Charity C. -
"No other lawyer knows the science of DUI like Lawrence does."Lawrence is the best lawyer I have ever met. If your career is on the line then he is the guy. No other lawyer knows the science of DUI like Lawrence does. I will be forever grateful!- Greg S.
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"It was miracle!"
It was miracle!... A lot of people don't really understand the benefit of having an attorney who used to be a prosecutor. They know all the little tricks and scare tactics the state has as opposed to just hiring an attorney who is a little fish in a big pond.
- Joe C. -
"One of the best."Lawrence Koplow is one of the best DUI and vehicular defense attorneys in the state of Arizona. Anyone would be extremely fortunate to have him as their advocate.- Jack L.
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"You cannot go wrong with Lawrence."Lawrence thinks outside the box and goes above and beyond for his clients and the legal community at large. If you are looking for aggressive representation, you cannot go wrong with Lawrence.- Charity C.
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"Nobody knows the court and laws better than him."Lawrence represents very high-profile clients who greatly depend on a good outcome, and this guy will deliver. This is a prosecutors' worse nightmare, and it should be that way if you need an attorney.- David E.
How I Defend Felony DUI Cases in Phoenix
Every aggravated DUI case turns on its own facts, and the defense has to match the specific evidence and circumstances at hand. What I bring to every case is a forensic foundation that goes beyond what most defense attorneys can offer. I authored the “Challenging Blood Alcohol Measurements” chapter in Aspatore Publishing’s treatise Defending Vehicular Homicide Cases (2015 Edition), and I maintain working relationships with forensic toxicologists, accident reconstructionists, biomechanical engineers, and ophthalmologists who contribute to case analysis when the evidence calls for it.
In 2019, I received the AACJ President’s Commendation for my work in State v. Diaz, in which I successfully challenged the constitutionality of an Arizona statute permitting warrantless blood seizure. The challenge was sustained in a published court opinion. Constitutional protection isn’t abstract legal theory in my practice. It’s a line of attack I’ve taken to the appellate level.
Defense challenges I examine in felony drunk driving cases include:
- Blood and breath test evidence: Equipment calibration records, collection procedures, blood vial storage and handling, chain of custody documentation, and laboratory analysis are all subject to scrutiny. Errors at any stage can undermine the reliability of a BAC reading.
- Field sobriety test validity: Field sobriety tests are standardized procedures, and deviations from those standards matter. Physical conditions, age, footwear, and surface conditions all affect performance and can be used to challenge an officer’s interpretation of results.
- Constitutional violations at the stop and arrest: A DUI stop requires reasonable suspicion; an arrest requires probable cause. Evidence obtained in violation of those standards can be suppressed, which can significantly affect the state’s case.
- Dashcam and bodycam footage: Discrepancies between what an officer documents in a report and what the video actually shows are a recognized and effective line of challenge.
- The triggering circumstance itself: In aggravated DUI cases, the circumstance that elevates the charge to a felony may itself be subject to legal challenge. The validity of an underlying license suspension, for example, is a separate question from whether the DUI occurred.
- Charge reduction and negotiated resolution: Defense options in felony DUI cases can include reduction from felony to misdemeanor charges and negotiated resolution with the Maricopa County Attorney’s Office. My prosecutorial background in that office informs how I approach those conversations.
A parallel MVD administrative proceeding runs concurrently with the criminal case, and the deadline to request a hearing can be as short as 15 days from the date of the written notice. Miss that window and you can face automatic license suspension, regardless of how the criminal case resolves. I handle both proceedings.
A Felony DUI Defense Built on More Than Credentials
A good person can find themselves facing a felony drunk driving charge after a single mistake, a procedural error by law enforcement, or circumstances that don’t reflect who they are. I don’t approach these cases with judgment. I approach them with thorough preparation.
The AACJ recognized my work with its Outstanding Contribution to DUI Defense Award in 2015, the first year that award was given, and with the President’s Commendation in 2019 for successfully challenging warrantless blood seizure practices in a published appellate decision. Southwest Super Lawyers has listed me every year from 2019 through 2025. I’m also a member of the National College for DUI Defense.
The difference between a felony conviction and a different outcome often comes down to whether your attorney has both the forensic knowledge to challenge the evidence and the prosecutorial experience to understand what the state values. I bring both to your case, personally.
Call (602) 560-7837 today. The Koplow Law Firm serves defendants in Phoenix and throughout the Scottsdale area. I’m available 24/7.
DUI Library
The best DUI defense stuff that only a few know and none want to share. A one of a kind annotated resource for lawyers, people accused, or anyone who wants to see what’s going on in our justice system with DUI cases… and how to fix it.
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Scottsdale DUI Definitive GuideScottsdale DUI Definitive Guide
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The Definitive Guide to Defeating an Arizona DUIThe Definitive Guide to Defeating an Arizona DUI
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Field Sobriety Tests in Arizona DUI CasesField Sobriety Tests in Arizona DUI Cases
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Traffic Stops in Arizona DUI CasesTraffic Stops in Arizona DUI Cases
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Warrantless Blood Draws in Arizona DUI CasesWarrantless Blood Draws in Arizona DUI Cases
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Right to Counsel in Arizona DUI CasesRight to Counsel in Arizona DUI Cases
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Failure to Preserve EvidenceFailure to Preserve Evidence