What Arizona’s State v. Mendoza Decision Reveals About Aggravated DUI Risk — And Why You Need an Experienced DUI Attorney

NOTICE: This case is a memorandum decision which means it is not for official publication under Arizona Supreme Court Rule111(c). The decision is not precedential and may be cited only as authorized by rule. Although not official precedent it does give an indication of what the court of appeals thinks about these issues.

A traffic stop. A breath test. A revoked license the driver may not have even realized was revoked. That combination of facts turned a single night in 2017 into a multi-year legal saga for one Arizona driver — culminating in a 2025 decision from the Arizona Court of Appeals, State v. Mendoza. For anyone facing a DUI charge in Arizona, this case is a clear illustration of how quickly a DUI can escalate into a felony, how unforgiving the state’s sentencing rules can be, and why the choices made in the first 48 hours after an arrest can shape the outcome for years to come.

As a DUI and criminal defense attorney serving clients across Arizona, I want to walk through what happened in this case, what the court decided, and what it means for anyone currently facing similar charges.

What Happened in State v. Mendoza

In 2017, Christian Alejandro Mendoza was pulled over on suspicion of impaired driving. The trooper noticed common signs of impairment — swaying and the smell of alcohol — and Mendoza agreed to a field sobriety test, during which he displayed six cues of impairment. He was arrested and taken to a police station, where two breath tests measured his blood alcohol concentration at 0.109 and 0.113, both above Arizona’s legal limit of 0.08.

How a Revoked License Turned a DUI Into a Felony

What turned this into a felony case, rather than a misdemeanor, was a records check: Mendoza’s driving privileges had been revoked. Under Arizona law, driving under the influence while your license is suspended or revoked elevates the offense to aggravated DUI, a class 4 felony, rather than the misdemeanor DUI most people associate with a first offense.

Mendoza was charged with two counts of aggravated DUI under A.R.S. § 28-1383(A)(1) — one for impairment to the slightest degree, and one for having a blood alcohol concentration of 0.08 or higher. He went to trial in November 2018, but failed to appear on the third day. The jury convicted him in his absence, and a warrant was issued. Mendoza remained at large for roughly 18 months before being arrested and finally sentenced in 2021 to concurrent terms of 4.5 years in prison.

The Legal Fight Over Mendoza’s Right to Appeal

What makes this case especially instructive isn’t just the DUI charge — it’s what happened next. Arizona law generally allows a defendant to waive his right to appeal if his absence prevents sentencing from happening within 90 days of conviction, unless he can show that absence was involuntary. Mendoza’s case bounced between the Court of Appeals and the Arizona Supreme Court over exactly this issue: had he knowingly and voluntarily given up his right to appeal by failing to appear?

Why the Supreme Court Sent the Case Back

The Arizona Supreme Court ultimately sent the case back to the trial court, citing its decision in State v. Brearcliffe, to determine whether Mendoza had received adequate notice that missing court could cost him his appellate rights. On remand, the trial court found that Mendoza had not received that notice — meaning his right to appeal was never properly waived. That finding is what allowed this most recent appeal, decided in January 2025, to move forward at all.

In the end, after reviewing the entire record under the Anders framework — a process used when defense counsel finds no arguable legal issue to raise — the Court of Appeals found no reversible error and affirmed Mendoza’s convictions and sentence.

Why This Case Matters If You’re Facing a DUI Charge

A few important lessons emerge from State v. Mendoza that apply to anyone facing DUI charges in Arizona today.

A Suspended or Revoked License Can Turn a DUI Into a Felony

Many drivers don’t realize their license has been suspended or revoked until a trooper runs their record during a stop. If that happens while you’re also accused of impaired driving, Arizona law allows prosecutors to charge aggravated DUI — a felony carrying years, not days, behind bars. Knowing your license status, and understanding how prior administrative or criminal history can affect a pending charge, is critical.

Missing Court Can Cost You More Than You Think

Mendoza’s decision not to appear for the final day of his trial set off years of additional litigation just to preserve his right to appeal — and he still spent 18 months as a fugitive before sentencing. Arizona courts take notice and appearance requirements seriously, and the consequences of missing a hearing can compound long after the original charge.

Sentencing Details Matter, and They’re Easy to Get Wrong

Buried in this otherwise routine affirmance is a notable detail: the trial court actually miscalculated Mendoza’s presentence incarceration credit, giving him one extra day. Because Arizona law doesn’t allow appellate courts to correct a sentencing error that favors the defendant unless the State cross-appeals, that mistake stood. It’s a reminder that sentencing calculations — credit for time served, repetitive offender classifications, concurrent versus consecutive terms — are technical, fact-specific, and often where the most leverage exists in a case.

Prior Convictions Can Dramatically Increase Your Exposure

The trial court found Mendoza to be a category two repetitive offender based on a prior felony, which affected his sentencing range. Arizona’s repetitive offender statutes are unforgiving, and an experienced attorney needs to scrutinize whether the State has actually proven a qualifying prior conviction by the required standard.

How an Experienced DUI Attorney Makes a Difference

Cases like this show why DUI charges — even ones that seem straightforward on the surface — benefit enormously from skilled legal representation. A few of the places where defense counsel can change the outcome include the accuracy and administration of breath or blood testing, including calibration records, timing, and chain of custody; whether the State has actually proven a prior conviction used to enhance a sentence, by the correct legal standard; whether a client received proper notice of the consequences of missing court, before any waiver of appellate rights is found; and identifying sentencing credit errors, enhancement issues, or procedural mistakes that a less experienced reviewer might miss entirely.

In Mendoza’s case, the appellate process took years and multiple rounds of review just to resolve procedural questions before ever reaching the merits. That kind of outcome underscores how much is at stake from the moment of arrest — and how important it is to have an attorney involved as early as possible, rather than after a conviction is already on the books.