The 21-year-old man accused in the King Soopers grocery store massacre is a martial-arts buff with a history of violence whose own brother describes him as "very anti-social."
Ahmad Al Aliwi Alissa allegedly stalked through the Boulder supermarket on Monday afternoon with a rifle and a pistol, firing shot after shot, and stripping off his combat vest and clothing until surrendering to a SWAT team.
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Ali Aliwi Alissa, 34, told The Daily Beast in a phone interview that his brother was paranoid, adding that in high school he would talk about "being chased, someone is behind him, someone is looking for him."