Montz is accused of the June 9 road rage killing of David Reynolds, 27, Carthage.
The probable cause statement detailed the confrontation between Chris Montz, 24, Neosho and David Reynolds, 27, Carthage, at Highway 249 near the intersection with I-44.
The statement indicated Montz and Reynolds pulled to the shoulder and while the men were arguing, Reynolds punched Montz twice in the face. Montz pulled a gun and shot Reynolds in the head.
A motion for bond reduction was denied. Montz is being held in the Jasper County Jail on a $50,000 cash-only bond.
Montz will be arraigned 1:30 p.m. August 15 in Division II.