This is a serious situation and the legal exposure is significant on multiple levels.
On the parole violation itself, New York State parole violations send the case back to the original sentencing judge and the parole board. The maximum consequence is serving the remainder of the original sentence, whatever time was left on the 28-year term when he was released. After serving that long, the remaining balance may be relatively short depending on where he was in the sentence, but that determination depends on the specific terms of his release.
The new charges are a separate and compounding problem. A DWI, an unregistered vehicle, and leaving the scene of an accident are three distinct matters on top of the violation itself. In New York, leaving the scene of an accident can range from a misdemeanor to a felony depending on whether there were injuries involved. A DWI for someone on parole from a 28-year sentence is viewed extremely seriously by the courts. The combination of all three, along with the parole violation, presents the judge and parole board with a picture of someone who was not ready for release regardless of the time served.
The cruelest part of this situation is the timing. Two months out after 28 years is an incredibly short window before things unraveled. That speaks to how profoundly difficult reentry is after extreme long-term incarceration, particularly without robust support structures in place.
He needs an attorney handling both the new charges and the parole violation simultaneously. The interaction between those two tracks requires coordinated legal strategy, and going into either proceeding without representation would be a serious mistake.