(AP) — A judge has set a trial date for a trucker accused of causing a crash that killed a family in western Nebraska.

Online court records show that 37-year-old Josef Slezak is scheduled to stand trial starting Sept. 16. The trial in Cheyenne County District Court is expected to last two weeks.

Slezak is charged with four counts of manslaughter, four counts of motor vehicle homicide, and one count of motor vehicle homicide of an unborn child.

Authorities say Slezak had been driving virtually nonstop from Milwaukee, Wis., and wasn’t paying attention before the crash on Interstate 80, about 40 miles from the Wyoming border. The crash killed Christopher Schmidt, his wife Diana Schmidt, and the couple’s two young children. Diana Schmidt was 30 weeks pregnant at the time.