He shot himself. Don't know if it was in his bald head or somewhere else. Tommy Marth -- a saxophone player for The Killers -- was found dead at his Las Vegas home Monday ... and according to reports, the death has been ruled a suicide. The Killers released a statement on Tuesday ... saying, "Last night we lost our friend Thomas Marth. Our prayers are with his family. Thereâ€™s a light missing in Las Vegas tonight. Travel well, Tommy.â€ Marth played sax on two Killers albums -- Sam's Town and Day & Age. He also toured with the band in 2008 and 2009. He was 33. Check out the Killers clip below for some badass Tommy Marth sax playing (starts at 1:05).