(Portland, OR) -- Detectives are asking witnesses of a shooting in Southwest Portland to come forward. Tuesday night, there were multiple reports of a shooting at a 76 Gas Station on Scholls Ferry Road. When Washington County Sheriff's deputies arrived, the people involved in the shooting were gone. A call to 9-1-1 reported a victim was being brought to a hospital. Forty-nine-year-old John James of Portland contacted detectives about his involvement. James was arrested for assault and unlawful use of a weapon. The shooting victim suffered non-life-threatening injuries.