For the parole voilation he can serve whatever time he had left on parole plus the other 2 charges if he is found guitly. The good thing about parole is if your parole is 4 years,you serve 3 w. out any problems,then mess up,the max they can hold you for is a year.With probation the clock can start again. If he getting locked up a lot a sort prision sentecne where once he is released he won't have any restrictions might work out best for him. The 1st step is to get a lawyer or legal aid,and ask them any question you may have.

