Will he get jail time for a felony charge and a probation?

Many things could happen just depending on the charges, the counties he is in, the attitude of the prosecutors, etc. Some times they try to help people get over addiction problems because incarceration just is housing for a short period?of time and will not help. Some times the participants just do not care. He needs a good lawyer. He may need to find another in-patient rehab (especially if he has insurance) - more often than not it takes multiple tries to help someone get over their addiction - and this is even assuming that they want help. (If they don't want help, nothing anyone else does will help them get over their addiction.)