Originally Posted by NatalieMojoHost

If he was under 18, I'd say show it to his parents and suggest they deal with this. There's no reason to ruin his life with a police report on what might be the first offense, that he might feel terrible about. On the other hand, he's now officially an adult. Maybe it's worth talking to him directly and explaining that you'll keep the video and file a police report the day you suspect that he might consider raising a hand on anyone else again.