I dont know details but I know he was sick and was never the same since his heart surgery years ago. My dad is a hardcore, irish, ex detective and wont show the pain he is in, but I know hes suffering. He went to sit with him in the hospital 2 days ago. They joked and laughed about the wii and other things and this morning he received the phone call. It upsets me too because he was so young..its just so scary.
I'm so sorry for you loss, your dad is dealing with this loss the only way he knows how. My prayers are with you and your family. Let him know that you are there for him.