I am going suggest a straight forward approach. Sit him down, lay out the concerns, the expectations going forward, and the consequences for not meeting those expectations.
Talk to him as an adult and show him some respect, and he might just respond accordingly.
I am not saying that I expect that he will straighten out, but this approach has worked for me on occasion at work when i deal with these type of behavioral issues. When it doesn't work we have to follow through with consequences as we lined them out.
I might still look into a camera to eliminate any questions about actions that you capture on film.
Talk to him as an adult and show him some respect, and he might just respond accordingly.
I am not saying that I expect that he will straighten out, but this approach has worked for me on occasion at work when i deal with these type of behavioral issues. When it doesn't work we have to follow through with consequences as we lined them out.
I might still look into a camera to eliminate any questions about actions that you capture on film.