Jared Loughner, who killed six and wounded 13, including Rep. Gabrielle Giffords, did not listen to political talks shows, but he did listen to a rock group that calls its fans "maggots."
Roxanne and George Osler IV, parents of one of Loughner's friends, told The Associated Press that their son and Loughner listened to Slipknot.
"Loughner, now 22, would come over several times a week from 2007 to 2008, the Oslers said," The Associated Press reported. "The boys listened to the heavy metal band Slipknot and progressive rockers The Mars Volta, studied the form of meditative movement called tai chi, and watched and discussed movies."
Slipknot is known for referring to its band members by numbers instead of names and for wearing what The New York Times has described as "gruesome masks."
In a Feb. 6, 2000, feature article in its Sunday Arts section, The Washington Post said: "Slipknot's lyrics articulate isolation and frustration. Mostly, though, they articulate rage. '(Expletive) it all! (Expletive) the world! (Expletive) everything that you stand for!' chants vocalist Number 8 in 'Surfacing,' while 'Eyeless' asks, 'How many times have you wanted to kill/ Everything and everyone -- say you'll do it but never will.'"
"But there's no question," the Post reported, "that Slipknot is tapping into something very dark in the mixed-up, muddled minds of thousands of angst-ridden young people, fans the band members refer to affectionately as 'maggots.'"
On May 23, 2003, two Slipknot listeners -- 20-year-old Jason Harris and 16-year-old Amber Riley -- led another young person, Terry Taylor, 22, on a late-night walk up a hill in a park in San Bernadino, Calif.
"They carried butcher knives and sang a song by the death metal band Slipknot as they lured their friend to his death, police say," the San Bernadino Sun reported on June 26, 2003.
"Police detectives testified that Riley and Harris told them they were listening to a Slipknot CD before and after they killed Taylor," the Sun reported.
"San Bernardino County Deputy District Attorney Doug Poston said Riley and Harris listened to the music of the heavy-metal band Slipknot, particularly a song titled 'Disasterpiece,' whose lyrics talk about slitting a victim's throat," the Riverside Press Enterprise reported on Aug. 31, 2004.
One of the first lines in Slipknot's "Disasterpiece" says: "I want to slit your throat and f--- the wound." Later, the song says: "Take a look inside my soul is missing/All I have is dead, so I will take you with me ..."
Harris and Riley were both convicted of murder.