Sioux City Felony DUI Defense Attorney

17 Years of OWI Defense. Instructor-Level Training in the Tests That Convict.

A felony OWI charge in Iowa, what most people call a felony DUI, carries consequences that reach far beyond the courtroom. Prison time, a six-year license revocation, a permanent criminal record that can’t be expunged, and lasting damage to employment and professional licenses are all on the table. The attorney defending this charge matters enormously. I’m Bryan Goodman, and my practice focuses exclusively on DUI and OWI defense in Sioux City and throughout Iowa. I’ve spent 17 years on this area of law and hold a certification as a DWI Detection and Standardized Field Sobriety Testing Instructor, which means I’m qualified to teach the same tests law enforcement uses in the field. I also hold the Forensic Science and Trial Skills Award from the National College for DUI Defense and carry years of jury trial experience. If your case needs to go to trial, I’m prepared to take it there.

Felony OWI cases involve a criminal proceeding in Iowa District Court and a separate Iowa DOT administrative process running simultaneously, each on its own timeline and governed by its own rules. That complexity rewards an attorney who concentrates in this area.

Call (712) 373-2621 or fill out the online contact form to schedule a confidential consultation about your Sioux City felony DUI charge.

What Makes a DUI a Felony in Iowa

Iowa uses the statutory term Operating While Intoxicated (OWI), governed by Iowa Code 321J.2. Whether you’ve seen it called DUI or OWI, the charge refers to the same conduct: operating a motor vehicle while impaired by alcohol or drugs. Most first and second OWI offenses are misdemeanors. Specific circumstances elevate the charge to a felony.

The most common felony trigger is a third or subsequent OWI offense within Iowa’s 12-year lookback period. That period runs from the date of the prior incident, not the date of conviction, so earlier offenses can count toward felony enhancement even when they feel like ancient history. Two other felony categories apply regardless of prior history:

• Third or Subsequent OWI: A Class D felony under Iowa Code 321J.2 when the current offense follows two prior OWI incidents within the 12-year lookback window.
• OWI Causing Serious Injury: A Class D felony under Iowa Code 321J.2(8), regardless of prior offense history.
• OWI Causing Death: Prosecuted as homicide by vehicle under Iowa Code 707.6A, a Class B felony carrying up to 25 years in prison.

A BAC of 0.15% or higher is an aggravating sentencing factor that affects ignition interlock requirements and temporary restricted license eligibility. It doesn’t independently create a felony charge.

Penalties for a Felony OWI Conviction in Iowa

The consequences of a felony DUI conviction in Iowa are severe and lasting. Iowa OWI convictions can’t be expunged from a criminal record, which means the consequences follow a person indefinitely beyond whatever sentence the court imposes.

• Third-Offense OWI (Class D Felony): Mandatory minimum of 30 days incarceration, up to five years in prison, fines ranging from $3,125 to $9,375 plus a 15% surcharge and court costs, and a six-year driver’s license revocation.
• OWI Causing Death (Class B Felony): Up to 25 years in prison and a six-year license revocation.
• Ignition Interlock Device: Required on any vehicle driven during a restricted license period following a felony OWI conviction. A BAC of 0.15% or higher triggers stricter interlock requirements and reduces eligibility for a temporary restricted license.
• Probation: Available in some felony OWI cases at the court’s discretion, but the mandatory minimum of 30 days incarceration still applies for third-offense convictions.
• Collateral Consequences: A felony OWI conviction affects employment eligibility, professional licensing, housing applications, and firearm rights well beyond the sentence itself.

The 10-Day Iowa DOT License Appeal Deadline

An OWI arrest in Iowa triggers two separate legal processes at the same time. The criminal case moves through Iowa District Court. Simultaneously, the Iowa DOT begins revoking your driver’s license through an administrative process that operates on its own timeline, independent of the criminal outcome.

From the date you are served by the officer, you have only 10 days to file an appeal with the Iowa DOT. Missing that window means the revocation takes effect automatically, with no hearing and no opportunity to contest it. CDL holders face a separate layer of commercial driving privilege consequences on top of the standard revocation process. This deadline alone is reason to contact a felony DUI attorney in Sioux City immediately after an arrest.

How I Defend Felony DUI Cases in Sioux City

My certification as a DWI Detection and Standardized Field Sobriety Testing Instructor gives me instructor-level knowledge of the NHTSA protocols officers must follow when administering the Horizontal Gaze Nystagmus, Walk and Turn, and One Leg Stand tests. I know what a properly administered test looks like, which means I also know when the administration was flawed. Each felony DUI case I handle gets a thorough review of the traffic stop, the field sobriety test administration, the breath or blood test procedures, and the prior conviction history used to establish the felony enhancement.

Defense avenues I examine in felony OWI cases include:

• The Basis for the Traffic Stop: Law enforcement must have articulable reasonable suspicion to initiate a stop. An unlawful stop can result in suppression of all evidence obtained from it.
• Field Sobriety Test Administration: NHTSA protocols for SFST administration are rigid. Officer errors in scoring, instruction, or test conditions can undermine the weight of those results.
• Breath Test Reliability: The Iowa DataMaster breath testing device must be properly calibrated and maintained. Procedural gaps in implied consent warnings or testing administration can affect the admissibility of results.
• The Felony Enhancement: Prior convictions used to elevate the charge must fall within Iowa’s 12-year lookback period from the date of the prior incident. Disputes about a prior conviction’s validity or timing are a viable defense avenue.
• Causation in OWI-with-Injury Cases: The prosecution must prove the OWI was the direct cause of the injury or death. A concurrent circumstance isn’t enough.
• Rising BAC: If alcohol was still being absorbed at the time of driving, the BAC at the wheel may have been below the legal limit even if the later test reading exceeded it.

Contact a Sioux City Felony DUI Attorney

Acting quickly after a felony OWI arrest gives the defense more to work with. The 10-day DOT appeal window closes fast, and early evidence preservation matters. I serve clients in Sioux City and throughout Woodbury County, Plymouth County, Sioux County, and Monona County. My practice is dedicated to OWI defense, so when you bring me a felony drunk driving case, it gets the full weight of that focus, not a slice of attention divided across unrelated practice areas. I handle the criminal case and the DOT administrative process simultaneously from day one, which can put you in a stronger position from the start.

To get started on your defense, contact Goodman Law Firm today at (712) 373-2621.