Lehigh County Coroner Scott Grim confirmed Friday that Lucas Cramer, 31, of Duncannon (Perry County), was the driver killed in a fatal truck crash Monday on Interstate 78.

Grim positively identified Cramer's body using DNA techniques. Deputy coroner Richard Kroon had already pronouned Cramer dead at the scene at 5:44 a.m. Monday.

Grim's autopsy revealed the manner of death was accidental and attributed it to blunt force head and chest trauma.

According to reports, a tractor trailer driven by Cramer smashed into the back of a truck driven by James Sherry while traveling east on I-78.

According to the reports, police said the two vehicles traveled 300 feet before rolling down an embankment.

The Lehigh County Coroner and Pennsylvania State Police conducted the investigation.