Everything you have stated suggests that he has violated his probation. I am skeptical that his move was authorized, but as you note he hasn't even slightly complied with probation since the move. He is hiding the details of his probation. If you want to turn him in, or just let the probation office know what's going on, contact the probation office for the sentencing court.
You and his wife are in a better position than anybody here to know the details of his sentence. A deferment with six years probation on a felony offense would be highly unusual.

