HIGHLANDS RANCH, Colo. (AP) — Hundreds gathered to honor victims and survivors of an attack that killed a teenager and wounded eight others at a suburban Denver high school.

About 2,000 people packed a high school gym Wednesday night to remember 18-year-old Kendrick Castillo, who was shot and killed trying to tackle one of the shooters at STEM School Highlands Ranch on Tuesday. Authorities have credited Castillo and two classmates with thwarting the attack.

Sen. Michael Bennet and Rep. Jason Crow, whose congressional district includes STEM, spoke about the need for gun control. The vigil dissolved as STEM students walked out to the parking lot, holding up lighted cellphones and yelling expletives at the media.

Students associated with the Brady Campaign to Prevent Gun Violence organized the vigil, held at nearby Highlands Ranch High School.

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