You could call Adult Protective Services like someone else suggested. It's hard though to get private placements when someone starts getting combative. Also if you have concerns about him driving you can make a report to the Motor Vehicle Commission medical review and they will evaluate whether he should still be driving.

You could apply to be guardian or you and your mom could apply to be co-guardians. Or another willing family member. Once guardianship is granted, you would make the decisions about living arrangements. In NJ there are no independent guardians and the State will only appoint a guardian generally if the person is already in a facility and is indigent. Some lawyers will appoint as guardians, but it's not typical.

File for guardianship, the Burlington County Surrogate's Office can assist. You will need two doctors to examine him and find that he had a mental issue or condition that makes him unable to make reasonable decisions for himself. The process is not that difficult and you can likely manage without an attorney, however if he is being belligerent his court appointed counsel may contest the guardianship on his behalf. If you think it is likely he would contest the guardianship, get a lawyer. There are a lot of great guardianship attorneys in Burlington County.