I hope that considering it was part of a 4-state plea deal he will be required to spend the entire 18-year sentence. I would imagine, just my own musings, that it would take those same four states to all agree on early release?
I'm not sure how that works. Maybe one of our SR legal experts can weigh in.
I doubt he serves the full sentence. Most folks don't if it's a non-violent act. I'm sure he'll serve the majority of it though. I mean even OJ got out early and some folks hoped he'd die in prison.