• Video
  • Shop
  • Culture
  • Family
  • Wellness
  • Food
  • Living
  • Style
  • Travel
  • News
  • Book Club
  • Newsletter
  • Privacy Policy
  • Your US State Privacy Rights
  • Children's Online Privacy Policy
  • Interest-Based Ads
  • Terms of Use
  • Do Not Sell My Info
  • Contact Us
  • © 2026 ABC News
  • News

16-year-old STEM school shooting suspect pleads guilty to murder

6:27
News headlines today: Dec. 23, 2020
Courtney Harper/AP, FILE
ByClayton Sandell
February 07, 2020, 10:43 PM

A 16-year-old accused in a Colorado school shooting pleaded guilty to multiple charges, including murder, on Friday.

Two teenagers, Alec McKinney and Devon Erickson, were arrested after allegedly opening fire at the STEM School Highlands Ranch near Denver on May 7, 2019.

Related Articles

MORE: 16-year-old STEM school shooting suspect to be tried as adult, judge rules

Kendrick Castillo, an 18-year-old who tried to confront the shooters, was killed. Multiple students were injured.

In this May 7, 2019 file photo, police officers and students are seen outside STEM School Highlands Ranch, a charter middle school in the Denver suburb of Highlands Ranch, Colo.
Courtney Harper/AP, FILE

McKinney -- who was born biologically female but identifies as male -- pleaded guilty Friday to multiple charges, including first-degree murder, attempted murder and conspiracy to commit first-degree murder after deliberation.

Related Articles

MORE: 20 years after Columbine, what's changed -- and what hasn't -- for school shootings in America

The mandatory minimum sentence is life with the possibility of parole after 40 years minus earned time, prosecutors said.

McKinney's sentencing is set for May 18, prosecutors said.

Related Articles

MORE: 'There's never a safe place': Colorado school training kindergartners to high schoolers to respond to an active shooter

Erickson, 18, pleaded not guilty. He has a trial scheduled for May, The Denver Post reported.

Up Next in News—

This San Francisco shop is run completely by an AI agent

April 23, 2026

Mother charged after teen son allegedly hits and injures 81-year-old veteran while riding e-motorcycle

April 23, 2026

UK bill banning smoking products for those born after 2008 is one step away from becoming law

April 22, 2026

Pilot killed in Florida plane crash hailed as hero

April 21, 2026

Shop GMA Favorites

ABC will receive a commission for purchases made through these links.

Sponsored Content by Taboola

The latest lifestyle and entertainment news and inspiration for how to live your best life - all from Good Morning America.
  • Contests
  • Terms of Use
  • Privacy Policy
  • Do Not Sell My Info
  • Children’s Online Privacy Policy
  • Advertise with us
  • Your US State Privacy Rights
  • Interest-Based Ads
  • About Nielsen Measurement
  • Press
  • Feedback
  • Shop FAQs
  • ABC News
  • ABC
  • All Videos
  • All Topics
  • Sitemap

© 2026 ABC News
  • Privacy Policy— 
  • Your US State Privacy Rights— 
  • Children's Online Privacy Policy— 
  • Interest-Based Ads— 
  • Terms of Use— 
  • Do Not Sell My Info— 
  • Contact Us— 

© 2026 ABC News