Officers Harold F. Horine and William F. Leiphardt, Jr., both 39 years old, were partners working out of the Baldwin Park Area office. Horine and Leiphardt were investigating a roadside crash involving an abandoned vehicle when a passing tractor and trailer swerved onto the shoulder, smashed into the abandoned car, and rammed it into the patrol officers. Horine and Leiphardt were both killed instantly. Officer Horine had been a member of the Patrol for 10 years, and Officer Leiphardt had 12 years of service with the CHP. The truck driver was charged with felony drunk driving and manslaughter.