High school shooter was a leftist:
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.
Schmidt said the shooter "was an outspoken kid about what he believed and a good political thinker."
Mendelson added, "He did have a lot of friends. He was popular with the people he knew."