at 48 seconds into the video, the cop takes the shots. His gun lines up with the victim over the middle of the forearm on the robber, which is about a feet away from body mass. Shooting from about 8 feet away, that's A LOT of room for error. If the bullet goes through the robber, it would probably miss the victim by 6 feet if not more.
Besides, the robber is looking straight ahead, i don't think he even noticed the cop shooting at him until seconds after he was already shot.