OSP Trooper Exam study materials
OSP Trooper Exam study resources

The Diabetic Driver on the Narrow Shoulder

OSP Trooper Exam · Put your knowledge to work in context.

All case studies

The Diabetic Driver on the Narrow Shoulder

At 02:14 on a rainy Tuesday you stop a silver 2007 Honda Civic on Oregon 99E near Milwaukie after it crosses the fog line three times in half a mile and brake-taps at a green light. The driver, a 58-year-old woman, fumbles for her license, speaks in thick, slow syllables, and says she is diabetic and 'just needs to get home - it's four blocks.' Her breath carries a faint alcohol smell, but there is an open bottle of mint mouthwash in the console. Her pupils are equal and reactive; you see no clear nystagmus; she cannot say whether it is morning or night. A glucometer in her purse displays 'HI.' She refuses a second check, saying you are 'not a doctor.' The shoulder is narrow, traffic passes at 55 mph, and backup is nine minutes out. She has no warrants, a valid license, and no prior DUII.

1. You have not yet asked her to step out of the car. What do you do first, and which specific details in the scenario drive that choice?

Read the worked answer

The glucometer is the pivot point. 'HI' on a home meter means the reading is above the meter's measurable range - it is a very high reading, not a low one. Combined with confusion about the time of day, thick speech, and no clear nystagmus, the picture is more consistent with severe hyperglycemia than with alcohol impairment. That reorders your priorities: a medical emergency outranks the DUII investigation, and a person in that state can deteriorate.

So: (1) request medics now and tell dispatch what the meter shows; (2) get her away from the traffic side - the shoulder at 55 mph is the most immediate hazard in the scene; (3) do not run SFSTs on a narrow shoulder with a medically unstable person, both because it is unsafe and because the results would be attacked as unreliable; (4) keep the DUII question open without deciding it - note the time, the open mouthwash bottle, the odor, and the driving behavior, and ask the hospital to draw blood, which serves her care and preserves evidence.

The mouthwash cuts both ways. Many mouthwashes contain ethanol and can produce a breath odor, so odor by itself proves little. The bottle is a fact to document, not a conclusion to draw.

2. She refuses medical transport and asks to walk the four blocks home, saying her neighbor will move the car tomorrow. How do you handle her, the vehicle, and the release-or-detain decision?

Read the worked answer

Walking away is not a safe option here: she is confused, it is dark and raining, and the roadway is the hazard you just removed her from. Explain the reason in one or two plain sentences, in the same calm tone, and repeat it rather than arguing - 'You're having a medical problem and I can't let you walk on this highway.' If she still refuses, the medical capacity determination belongs to medics or fire, not to you; your job is to keep her from driving or wandering into traffic until they arrive.

For the car: it cannot sit on a narrow shoulder at 02:00 with traffic at 55 mph. Weigh a tow against moving it to a legal, well-lit spot, and consider releasing it to a licensed, insured driver she names. Whatever you choose, write down the decision and the reason.

Nothing about the medical emergency erases the driving conduct. You can cite or arrest later; if a blood draw shows impairment, a warrant can follow. Write your observations the same shift - the case may rest on what you saw in those first four minutes.

3. What must you be able to articulate to support a DUII charge in this case, and what should you deliberately not write in your report?

Read the worked answer

The elements you must be able to articulate are that she operated a motor vehicle in Oregon while affected by an intoxicant to a perceptible degree. That means facts about operation (the three fog-line crossings, the brake-tap at a green light, the half mile of travel) and facts about impairment (speech, confusion, coordination, appearance, any admissions), each tied to a time.

What not to write:

  • Do not write a diagnosis. 'She was in DKA' and 'she was drunk' are both conclusions you are not qualified to reach in a report. Write what you saw and let the medical record and the chemical test speak.
  • Do not treat the odor as proof. The mouthwash bottle gives the defense an innocent explanation for the smell; if you overstate odor, you hand them the case.
  • Do not imply medical and impairment are mutually exclusive. A diabetic can also be impaired, and an impaired person can also be in crisis. Both can be true, and the report should not foreclose either.
  • Do not editorialize about her refusal. Document that she declined, and what you told her before she declined.