An autopsy shows that a western Michigan police officer had the prescription antidepressant paroxetine and caffeine in his system at the time his patrol car crashed into a tree.

A Michigan State Police report obtained through a Freedom of Information Act request on Friday says Norton Shores officer Jonathan Ginka's blood tested positive for the substances.

►Related: MSP: Crash leading to Officer Ginka's death ruled accidental
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Paroxetine is used to treat depression, anxiety disorders and obsessive-compulsive disorder.

Ginka was traveling at 46 mph and didn't brake until the last second before his cruiser struck the tree on May 10, killing him. He was wearing a seat belt. His death was ruled accidental.

State police said last month that the cause of the crash remained unknown.

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