I finally watched this show. I was sort of glad I was spoiled by this thread so it wasn't so horrifying when I heard he died.
Obviously this was a terrible injustice, made more tragic by his death so soon after his release. But I'm trying to focus on what an incredible vindication this was for Pete and his family. He was able to die, surrounded by loved ones, knowing the shadow had been lifted. If he'd died a little sooner, he would have died alone in prison, and the family wouldn't have been able to say goodbye.
In contrast to Pete's strong and functional children, Kathleen's daug