made light of his incarceration by wearing a prison uniform on stage during live performances. Steele stated in a 2003 interview that he had bipolar disorder, and linked his mood swings to the types of songs he wrote. He also received occasional psychiatric treatment for depressive episodes. During a 2007 interview Steele explained:"I've always been a very depressed person, but that's only one side of me, you know. It makes me feel better when I can express my depression, my anger, my frustration through music ... sonic therapy." In April 2007, Steele revealed that he began identifying himself as Roman Catholic in recent years, after decades of self-professed atheism. In an interview with Decibel magazine, Steele explained: "There are no atheists in foxholes, they say, and I was a foxhole atheist for a long time. But after going through a midlife crisis and having many things change very quickly, it made me realize my mortality. And when you start to think about death, you start to think about what's after it. And then you start hoping there is a God. For me, it's a frightening thought to go nowhere. I also can't believe that people like Hitler are gonna go to the same place as Mother Teresa." Steele's biography Soul on Fire – The Life and Music of Peter Steele was written by Metal Maniacs editor Jeff Wagner, and was released in 2013. None of the surviving band members cooperated with Wagner in the creation of the book. Death and tributes In an interview given before his death, Steele noted that, as a result of his dependence on alcohol and cocaine, he had developed problems with some of his organs. He had stated: Steele died of sepsis caused by diverticulitis (initially reported as heart failure) on April 14, 2010 at the age of 48. Prior to his death, he was preparing to write and record new music. The remaining members of Type O Negative decided to dissolve the band rather than replace Steele, with Johnny Kelly stating "Even if there is somebody who could take his place it wouldn't matter. We don't have any interest in continuing. It's impossible – it hasn't even come up in any kind of discussion. When Peter died, Type O Negative died with him." Tributes On November 21, 2011, an oak tree was planted in Prospect Park to commemorate Steele. In 2011, the band Necrophagia