The shooter appears to have been a liberal and mocked republicans and held strong beliefs for gun laws.
The teenage gunman who entered Arapahoe High School on Friday afternoon and shot two fellow students with a shotgun was outspoken about politics, was a gifted debater and might have been bullied for his beliefs, according to students who knew him.
Arapahoe County Sheriff Grayson Robinson identified the gunman as Karl Pierson, an 18-year-old student.
"He had very strong beliefs about gun laws and stuff," said junior Abbey Skoda, who was in a class with Pierson during her freshman year. "I also heard he was bullied a lot."
Robinson said that his department was investigating reports that Pierson was seeking to settle a score with a teacher after a confrontation.
Pierson also appears to mock Republicans on another Facebook post, writing "you republicans are so cute" and posting an image that reads: "The Republican Party: Health Care: Let 'em Die, Climate Change: Let 'em Die, Gun Violence: Let 'em Die, Women's Rights: Let 'em Die, More War: Let 'em Die. Is this really the side you want to be on?"
Carl Schmidt and Brendon Mendelson, both seniors at Arapahoe High, knew Pierson. They said he had political views that were "outside the mainstream," but they did not elaborate.