Two shooters were overpowered as they fired at classmates at STEM School Highlands Ranch in Colorado Tuesday, according to police. Devon Erickson, 18, and an underage accomplice allegedly opened fire at the school, killing one and injuring eight others. Kendrick Castillo, 18, is being hailed a hero. He was shot to death as he reportedly confronted Erickson. With his help, a couple of other students were able to pin Erickson to the ground and end the carnage.