jokingly making a shooting motion towards the man. that night, police were initially called to the sss convenience store responding to a 911 call from a witness who saw a man with a gun. watch closely as things escalate quickly. from salamoni's perspective, you can see a brief struggle. then his gun is trained on sterling's head. >> don't you [ bleep ] -- shoot you in the [ bleep ] head, you hear me? >> all right, hold up, you're hurting mile arm. >> reporter: sterling was pinned to the ground and tazed twice. >> get on the ground. get on the ground. pop him again, howie. >> reporter: before being fatally shot. [ gunfire ] previously released cell phone videos show at this point in the encounter salamoni believed sterling was arming. a gun was recovered from sterling's body. but the federal and state investigations determined that the officer's actions were reasonable and couldn't prove that sterling wasn't reaching