State Troopers have identified the two people killed in a single-vehicle crash Sunday night in Van Zandt County. Investigators say a vehicle ran off the road, hit several trees and ended up in a ditch near Mabank. Two passengers in the vehicle, 65-year-old Thomas Eugene Bickerstaff, Jr., of Duncanville, and 38-year-old William Fredrick Sherrard, of Mabank, were pronounced at the scene. The driver and another passenger were injured.