(CBS News) A high school student charged in a classmate's death during a Colorado school shooting told police that he planned the attack for weeks and intended to target classmates who repeatedly mocked his gender identity. Written summaries of police interviews with the two suspected shooters portray 16-year-old Alec McKinney as the leader of the attack, enlisting 18-year-old Devon Erickson in the plan to kill the students who bullied McKinney, who identifies as male.
Both teenagers told police that they broke into a gun safe at one of the teenager's homes before walking into the STEM School Highlands Ranch on the afternoon of May 7 with a guitar case and a backpack concealing four guns.
McKinney "said he wanted the kids at the school to experience bad things, have to suffer from trauma like he had had to in his life," the document said. "He wanted everyone in that school to suffer and realize that the world is a bad place."
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