Unfortunately when you do a good deed to help a family member, it might put you in a bad situation. You may need to legally evict him and if you are unfamiliar with the process, should probably consult an attorney.
If you are feeling threatened though, you can contact Canton PD or Cherokee SO and get a Restraining Order. This will sometimes allow you to prevent him from being in your home while you go thru the eviction process. It can be a tricky situation.
Good luck! And be safe.