He worked part-time at a local manufacturing company that had offered him a job after an internship because he was such a standout employee. But investigators offered no immediate motive.Ĭastillo sprang into action against the shooter 'and immediately was on top of him with complete disregard for his own safety,' said Bialy, a close friend.Ī member of the school's robotics club and a relentless tinkerer, Castillo had an infectious smile and gentle sense of humor, according to friends. They allegedly walked into the STEM School Highlands Ranch through an entrance without metal detectors and opened fire in two classrooms.īecause the attack happened only miles from Columbine High School and just weeks after the shooting's 20th anniversary, questions quickly arose about whether it was inspired by the 1999 massacre. The attackers were identified by law enforcement officials as 18-year-old Devon Erickson and a younger student who is a juvenile. 'We're going to hear about very heroic things that have taken place at the school,' Douglas County Sheriff Tony Spurlock said Wednesday. Authorities said these acts of bravery helped minimize the bloodshed from the attack, which also wounded eight people.
