NORTON SHORES, Mich. — 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. reports Friday that a Michigan State Police report obtained through a Freedom of Information Act request says Norton Shores officer Jonathan Ginka’s blood tested positive for the substances.

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.

Information from: The Muskegon Chronicle,