He helped engineer some great music, but he was a real piece of shit overall. Holding his wives and children essentially as prisoners, torturing them, threatening them with murder if/when they left.
A fucking asshole. The world is better off without him.
Specter was in a bad car wreck some years ago. He went through the windshield and was almost declared dead at the scene. They did a lot of work on his head, but they said he was never right after that. A lot of people think he wasn't right before that, either.