Driver found dead after big rig hits tree on interstate median

HOOD RIVER, Ore. - Medics found a 64-year-old trucker dead behind the wheel of a big rig after the tractor and trailer drifted off the road and crashed into a tree in the center median on Interstate 84 on Friday morning.

Police identified the driver as Melvin Roy Schwark, 64, of Lyle, Wash.

For an unconfirmed reason, the truck and trailer gradually drifted to the left and struck the guardrail on the south side of the traffic lanes, police said.

The truck and trailer continued westbound into the center median before colliding with a tree.

A tree section came down, partially blocking the left eastbound lane.

Emergency crews found the driver dead in the truck.

Investigators are looking into the possibility that the driver suffered a medical emergency prior to the crash.