May 7, 2019; 4 years ago (2019-05-07) 1:53 pm (MDT (UTC−6))
Target
Students at STEM School Highlands Ranch
Attack type
Mass shooting, school shooting
Weapons
Glock 21 .45-caliber semi-automatic pistol
Beretta M9 9mm semi-automatic pistol
Taurus 990 Tracker .22-caliber Revolver
Ruger 10/22 .22-caliber semi-automatic rifle[1]
Deaths
1 (Kendrick Castillo)
Injured
8 (6 by the perpetrators, 2 by private contractor security)
Perpetrators
Alec McKinney[2] and Devon Erickson[3]
Motive
Misanthropy
Retaliation for bullying
On May 7, 2019, a school shooting occurred at STEM School Highlands Ranch, a charter school located in Douglas County, Colorado, United States, in the Denver suburb of Highlands Ranch. One student was killed and eight others were injured. Sixteen-year-old Alec McKinney and eighteen-year-old Devon Erickson were convicted on dozens of charges and sentenced to life imprisonment.[4] It, along with the Columbine High School massacre, is one of the only 6 school shootings to be carried out by two individuals.
^Pampuro, Amanda (November 18, 2019). "Accused Colorado School Shooter Fights to Be Tried as a Minor". Courthouse News Service. Archived from the original on January 16, 2020. Retrieved January 16, 2020.
^Cite error: The named reference plea was invoked but never defined (see the help page).
^Arenas, Vicente (June 15, 2021). "Devon Erickson found guilty on all counts". Fox31 Denver. Archived from the original on June 15, 2021. Retrieved June 15, 2021.
^"1 student dead, multiple injured in Highlands Ranch school shooting, multiple ranking sources say". The Denver Channel. May 7, 2019. Archived from the original on May 7, 2019. Retrieved May 7, 2019.
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