COUNCIL BLUFFS, Iowa (AP) – One of the three men suspected in the death of a Council Bluffs man has pleaded not guilty to a murder charge. The Daily Nonpareil reports that 18-year-old Caine Petersen‘s attorney submitted a written plea on Friday.

Petersen and 23-year-old Christopher King, of Lincoln, Nebraska; and 22-year-old Sarael Duncan, of Omaha, Nebraska, are accused of robbing Jacob Combs of marijuana. Authorities say the 20-year-old Combs died in a hospital Aug. 15th, after being found in a Council Bluffs street.

Officers say Combs jumped onto Petersen’s vehicle as the three men fled the scene but then fell or was thrown, suffering head injuries when he was struck.