Thanks very much for the quick reply.
I think that just about anyone can see that your brother has a drug problem and it's spun out into other areas of his life. But it all is going to come down to whether probation is going to want to still work with him and address this, or whether they just don't see any point in it and want to wash their hands of him.
Some of that will depend upon the strength of the various cases that he's charged with, since some of the charges can be prosecuted as felonies and if the DA is looking to indict the new charges, incarceration will be inevitable. If the charges are reduced, some of that will depend upon how long he's been on probation. The less time he's been on probation, the better for a possible alternative non-incarceratory resentencing. Once he's been on probation for a while and has theoretically had the benefit of probation, he's supposed to know better and violations are taken much more seriously.
If probation feels they don't want to work with him, what they will do is to make a reccomendation to the judge as to how much time he should do. The judge does not have to listen to probation, though he generally will give probations wishes great deference. He has the power to resentence him on the old case to anything up to the maximum that the statute allows for the offense to which he pled gulty. The judge can give him more time than probation asks for if the thinks it's appropriate. But he can also give him less.
Your brother will have a hearing on the violation where the state will make their position clear as to the new case. He needs a lawyer for that hearing, to make an argument for something like full-time long term residential treatment or house arrest. Or, if the DA plans on indicting the new felonies, to cut some kind of package to keep his prison time to the minimum possible under all of the facts and circumstances.
So the bottom line is that it's too soon to tell what is going to happen, but with the number of the charges, a revocation of probation is likely unless the DA is willing to go forward with them as misdemeanors
and and allow him to have more intensive treatment.