Frank Budka, of Middletown, pleaded guilty to a dozen charges stemming from the Jan. 29 crash in Bucks County, including homicide by vehicle. But he went to trial this week on the impairment charge and awaits a judge's decision expected Thursday.
The 45-year-old Budka caused a crash that killed Middletown Township police Officer Chris Jones as Jones returned to his cruiser during a traffic stop.
Budka argues that he had only traces of marijuana in his system. But prosecutors say it impaired him when combined with methadone and a painkiller.
The 37-year-old Jones was married with three children.