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Driver killed in Aug. 18 wreck intoxicated, coroner says

Sep 5, 2017 By Katie Roenigk, Staff Writer

A driver who died last month in a one-vehicle rollover above Dubois was impaired by "mixed drug intoxication," officials said this week.

Charles A. Marquardt, 56, of Illinois, died of blunt force head trauma and internal injuries resulting from the accident, which occurred late in the evening Aug. 18 on Horse Creek Road.

His female passenger was treated and released from a local hospital. She was wearing a seatbelt, Fremont County Coroner Mark Stratmoen said, while Marquardt was not. He was ejected from the vehicle during the crash.

Mixed drug intoxication

Marquardt was under the influence of alcohol,

Valium, Adderall and hydrocodone at the time of his death, toxicology testing showed.

The levels of each prescription drug in his system were within therapeutic limits, Stratmoen said, but none of those substances is meant to be used in conjunction with alcohol.

As a result, Stratmoen has determined that mixed-drug intoxication was a contributing factor in the death.

"While individually (the substances) probably wouldn't have been relevant, together they all are relevant in the death," Stratmoen said.

Toxicology revealed Marquardt's blood-alcohol content was .085 - "just slightly above the legal limit," Stratmoen said.

He also had 30 nanograms per milliliter of amphetamine and 360 ng/ml of phentermine in his system.

"The phentermine is a metabolite of amphetamine," Stratmoen said. "And in this case ... the brand name is Adderall."

The test showed 75 ng/ml of diazepam and 190 ng/ml of nordiazepam as well.

"Diazepam is Valium," Stratmoen said, "and nordiazepan is the metabolite of that."

Finally, there were 12 ng/ml of hydrocodone, a pain medication.

Responders were called early Aug. 19 to the scene of the crash 18 miles north of Dubois near Cartridge Creek.

The incident involved a 1997 Toyota passenger car.

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2017-09-24

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