OKLAHOMA HIGHWAY PATROL / MUG: Trooper John Barter Barter joined the OHP in 1953. Trooper Barter was on patrol on Highway 62 near Altus when he turned onto a county road to investigate a disturbance. He found a parolee and a woman. It was later determined that the pair had shot at the man's wife and had just tried to kill a black porter. When Barter directed the man to surrender his weapon, the parolee shot the trooper in the chest. A motorist reported the crime and the two were arrested at an OHP roadblock near Randlett three hours later. The man was executed for the crime in 1960 and the woman was sentenced to prison and paroled in 1975.