Colorado Felony DUI Lawyer

Most DUI charges in Colorado are misdemeanors. But once a driver has three or more prior DUI or DWAI convictions, the fourth charge becomes a felony — a dramatic shift that changes everything about how the case is defended, from bond conditions to sentencing exposure.

At Mile High Legal, our felony DUI attorneys represent clients across Denver and throughout Colorado facing this elevated charge. A felony DUI conviction carries consequences far beyond a standard DUI, including a permanent felony record and significantly longer potential incarceration.

When Does DUI Become a Felony in Colorado

Under C.R.S. § 42-4-1301, a DUI or DWAI charge becomes a felony when the current offense is a person’s fourth or subsequent impaired driving violation, counting prior DUI, DWAI, DUI per se, and certain out-of-state or vehicular assault/homicide convictions. Unlike the three-strikes framework in some other areas of law, Colorado counts prior qualifying convictions from any point in a person’s driving history — there is no lookback window that erases old convictions.

Felony DUI is charged as a class 4 felony under C.R.S. § 42-4-1301(1)(a), carrying the possibility of prison time, extended probation, mandatory alcohol or drug monitoring, and a lengthy license revocation.

Important Points From Colorado Model Jury Instructions and Case Law

• Prior convictions must be proven to the jury, not just found by a judge. The existence of the qualifying prior convictions is an element of felony DUI that the prosecution must prove beyond a reasonable doubt to the jury, not a sentencing factor decided separately by the court. Linnebur v. People, 2020 CO 79M, 476 P.3d 734. Because of this, the trial cannot be split into separate guilt and prior-conviction phases — the jury hears and decides the prior-conviction evidence in the same trial as the current charge. People v. Kembel, 2023 CO 5, 524 P.3d 18.
• Proving a prior conviction belongs to this defendant takes more than a name match. A shared name and date of birth, or a generic descriptor like “Caucasian Male,” is not enough on its own to prove the prior conviction is actually the defendant’s. People v. Herold, 2024 COA 53 (citing Gorostieta v. People, 2022 CO 41, 516 P.3d 902). This is frequently a real point of attack on the felony enhancement itself.
• “Drive” means actual physical control. A person doesn’t need to have the vehicle in motion to be convicted — being in actual physical control of it while impaired is enough. People v. Swain, 959 P.2d 426 (Colo. 1998).

Common Defenses to Felony DUI Charges

• Challenging prior convictions — verifying that qualifying prior convictions are accurately documented and legally count toward felony enhancement.
• Contesting the traffic stop — challenging whether officers had reasonable suspicion or probable cause to initiate the stop.
• Field sobriety and chemical test issues — scrutinizing how field sobriety tests were administered and whether breath or blood testing followed proper procedure.
• Rising BAC defense — arguing that blood alcohol content was below the legal limit while driving and only rose above it by the time of testing.

Why Choose Mile High Legal

Felony DUI cases require someone who understands both the criminal exposure and the DMV consequences that run alongside it. We work both tracks from day one to protect your record, your license, and your freedom.