Devon Erickson, an accused STEM school shooter, signs paperwork during his advisement at the Douglas County Courthouse in Castle Rock, Colo., Wednesday, May 8, 2019. The attackers were identified by law enforcement officials as 18-year-old Erickson and a younger student who is a juvenile and was not named. They allegedly walked into the STEM School Highlands Ranch through an entrance without metal detectors and opened fire in two classrooms. (Joe Amon/The Denver Post via AP, Pool)
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