The May 7 shooting at STEM School Highlands Ranch killed student Kendrick Castillo and injured eight others. Castillo, 18, was killed in the shooting after he and two other students rushed one of the shooters who opened fire in the classroom.
McKinney is being tried as an adult although he was a juvenile at the time of the shooting.
McKinney pleaded guilty to:
• first-degree murder in the death of Kendrick Castillo;
• conspiracy to commit first-degree murder after deliberation;
• 6 counts of attempted murder after deliberation
• attempted murder extreme indifference (this count is amended to name everyone who was not physically shot in room 107)
• second-degree assault (this count identifies the victims who were injured as a result of the security guard’s response to the active shooter situation)
• conspiracy to commit arson
• conspiracy to commit burglary
• conspiracy to commit criminal mischief
• possession of a weapon on school grounds
• possession of a handgun by a juvenile
• 2 crime-of-violence sentence enhancers
Other charged counts were dismissed as part of the plea agreement.
Sentencing is scheduled for May 18 at 9 a.m.