By Sibley's own account, he was explaining to Motley his personal theory that he was not required to have one, when he observed Motley placing his hand on his gun. Sibley then drew his gun and began shooting at Motley, who returned fire, wounding Sibley. Motley took cover behind his patrol car; witnesses stated Sibley fired first. Block was at a payphone when she heard the gunfire. She drew her gun and witnesses stated that she was in a crouched position when she fired. Block claimed that she fired just as she stopped running toward Motley. As Motley turned to face Block, she fired again, hitting him in the chest. Motley, who had given his bulletproof vest to another officer, was mortally wounded.