P-Stones family wouldn't have much of a say in regards to criminal charges unless things are wildly different in the states, also surely he would charged with something wouldn't he, didn't he have THC in his system? Maybe not the full on vehicular manslaughter but I would have though he would have been charged with something.
Regardless good to see him free and skating, I think that could help his recovery.
They could probably ask for leniency at sentencing. But, its unlikely an elected DA would not press charges due to the family not asking for charges. They after to view the macro issue, and if they let him off and he did something stupid again like drink and drive that results in another death (just talking in general, not about Cory specifically) it would look really bad for all parties involved.
I don't think this is a major story outside the skateboarding community, so I just wonder if there was never a follow-up on the story by those local news outlets. I hope for Cory that he is in the clear, what he has to live with is terrible. I mean, we are talking about a guy who made a mistake that killed a close friend. Someone who had moved up to live near him and hang-out. He probably interacted with P-Stone's kids countless times, and I can't imagine that guilt.