(KTRS) – St. Louis County Police say that the autopsy of 18-year-old Amonderez Green shows his only wound was a self-inflicted gunshot below his chin.

Police were called to a Ferguson home October 28 on reports that someone, later identified as Green, may be suicidal. When officers arrived, Green ignored their commands. He eventually pulled a gun and shot at officers. They shot back, but investigators say they never hit Green. Police say that Green shot himself after running around the front of the house and out of the sight of officers.

Green’s parents have said they believe their son was killed by police.