Suicide by carbon monoxide.
http://music.msn.com/music/article.aspx?news=255077>1=7702
I just can't understand somebody committing suicide when they have a fiancee. A wife? Yes. An ex-wife? Definitely. A girlfriend? Possibly. But why does one off themselves while also planning to get married? Just makes no sense.
From what little information there was from the police I figured that's what it would be. He seemed to be enjoying life career wise. I wonder if there were problems with his relationship.