CLAY COUNTY, Ind. (WTHI) - Police have released new details on a deadly crash on Interstate 70 in Clay County.

Police say Daryl Duhrkoff of Michigan died in the crash.

They say it was a medical incident, and not the crash, killed him.

Authorities say Duhrkoff was driving on 70 when his passenger was not able to get his attention.

She told police he was acting normal and then had a blank stare.

That's when they say the car drifted off the road and hit the wood line.

First responders and passersbys tried to revive Duhrkoff.

The passenger was transported to an area hospital with non-life threatening injuries.

An autopsy is set for Friday.

Clay: Troopers are responding to a single vehicle accident on Interstate 70 at the 17mm eastbound. Please use caution in the area to allow emergency crews to work. #ISP53 pic.twitter.com/oaolqeHFqU

— Sgt. Matt Ames (@ISPPutnamville) August 15, 2019

Traffic is moving slowly on I-70 eastbound near Brazil after a single-car accident. More information to follow. pic.twitter.com/CZm7hy6O6L

— Tilly Marlatt (@Tilly_WTHI) August 15, 2019