Background: Boston is an American rock band from Boston, Massachusetts, who had their most notable successes during the 1970s and 1980s. Centered on multi-instrumentalist founder and leader Tom Scholz, the band is a staple of classic rock radio playlists. Boston's best-known works include the songs "More Than a Feeling", "Peace of Mind", "Foreplay/Long Time", "Rock and Roll Band", "Smokin'", "Don't Look Back", "A Man I'll Never Be", and "Amanda". They have sold more than 75 million records worldwide, including 31 million albums in the United States, of which 17 million were from their self-titled debut album and seven million were for their second album,
Context: On March 9, 2007, lead singer Delp committed suicide at his home in Atkinson, New Hampshire. Police found him dead in his master bathroom, along with several notes for whoever would find him. In the bathroom where he committed suicide, two charcoal grills were found on the bathroom fixtures, and the door sealed with duct tape and a towel underneath. Police Lt. William Baldwin called the death "untimely" and said that no foul play was indicated. Delp was alone at the time of his death, according to the police report. He was found by his fiancee, who saw a dryer hose attached to his car. According to the New Hampshire medical examiner, his death was the result of suicide by carbon monoxide poisoning as evidenced by carboxyhemoglobin. Delp's last concert with Boston was performed at Boston Symphony Hall on November 13, 2006, at a concert honoring Doug Flutie.  A concert in honor of Delp named "Come Together: A Tribute to Brad Delp" occurred on August 19, 2007, at the Bank of America Pavilion in Boston. The concert included, in order of appearance, Ernie and the Automatics, Beatlejuice, Farrenheit, Extreme, Godsmack, RTZ, Orion the Hunter, and finally the current version of Boston.  All of the living members of Boston were invited to perform in the concert. The singers for Boston included Michael Sweet of Stryper, former band member Curly Smith, band member Kimberley Dahme, and a Boston fan from North Carolina named Tommy DeCarlo, who was chosen to sing based on his performances of Boston cover songs on his MySpace page. Another former Boston vocalist, Fran Cosmo, was unable to sing because of a ruptured blood vessel in his throat, but did play guitar. Jim Masdea, Fran Sheehan, and even Barry Goudreau joined Scholz and the rest of the band on stage for the finale, "Don't Look Back". Curly Smith and Kimberley Dahme split the lead vocal on the finale. Sib Hashian, while present, refused to go on stage with the other Boston alumni, citing discomfort with Tom Scholz.
Question: why did he kill himself?. Whats the answer?