his gun is trained on sterling's head. >> i'll shoot you in your [ bleep ] head, you hear me? don't you [ bleep ] -- >> all right, hold up, you're hurting my arm. >> reporter: sterling then was pinned to the ground and tased twice. >> get on the ground! get on the ground! pop him again, howie. >> reporter: before being fatally shot. [ gunshots ] previously released cell phone videos recorded by bystanders show at this point in the encounter salamoni believed sterling was armed. 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 for a gun. salamoni's attorney tells me they will appeal the chief's decision to fire him as a matter of principle more than anything else. as this new video circulates, sterling's family is trying to keep his five children from seeing it. the family's attorney says