OWI causing serious impairment charges in Detroit are felony cases that typically arise from injury crashes where alcohol or drugs are alleged. The words “serious impairment” are legally meaningful and medically contested, and the defense must evaluate both the injury evidence and the causal relationship to the driving.

The prosecution must prove an underlying Section 625 violation and must also prove that the operation of the vehicle caused a serious impairment of a body function. Cases can become distorted when injury severity is assumed rather than proven with medical records and admissible testimony.

These cases often involve multiple expert disciplines, including reconstruction, toxicology, and medicine. A defense strategy should anticipate the state’s expert themes and prepare to test the reliability of their opinions and the completeness of their underlying data.

Even where a collision occurred, the state still must prove impairment at the relevant time and must connect that impairment to the injury outcome. A defense that insists on element-by-element proof is often the most effective way to control risk.

OWI Causing Serious Impairment: Key Issues

Michigan’s Section 625 includes a felony offense for OWI or OWVI causing serious impairment of a body function. The Traffic Benchbook identifies this offense as Section 625(5) and links it to standard jury instructions addressing the elements of the charge. The prosecution’s burden includes proof of an underlying OWI-type violation and proof that the operation of the motor vehicle caused the serious impairment.

Serious impairment cases usually turn on two proof problems. The first is impairment at the time of operation, which may rely on officer observations, field sobriety tests, and chemical testing. The second is causation, which requires the state to show that the defendant’s operation, not merely a crash, caused the relevant impairment outcome. Accident dynamics, roadway conditions, speed, and the conduct of other drivers frequently provide alternative explanations that are consistent with reasonable doubt.

Where the state relies on chemical testing, counsel should scrutinize the legal basis for obtaining the sample and the reliability of the testing and reporting process. Where the state relies on officer testimony and field tests, counsel should focus on what the video shows and whether the observations were interpreted through a confirmatory lens after a crash.

Because these are high-stakes felonies, early and disciplined defense work matters. Independent reconstruction, complete medical record review, and targeted motion practice can narrow the case to what can be proven under the statute, rather than what is assumed from the severity of the event.

Why Choose William Maze As Your Criminal Defense Attorney?

As a Detroit criminal defense attorney, I provide specialized expertise in Detroit's court systems. I understand the specific procedures, judges, and prosecutors in Detroit courts, giving my clients a distinct advantage in their criminal defense cases.

Local Expertise:

• Knowledge of Detroit judges' preferences
• Experience with Detroit prosecutors
• Understanding of local court procedures
• Relationships with court personnel

Attorney Credentials:

• 28+ years Detroit experience
• Expert witness qualified
• Former CDAM President
• SFST certified instructor

William J. Maze, Esq.

Detroit Criminal Defense Attorney

Expert Witness 28+ Years