CENTENNIAL, Colo. (KDVR) — Convicted STEM school shooter Devon Erickson will be sentenced on Friday at 1:30 p.m. in a Douglas County courtroom. A jury returned its verdict on June 15 after a 12-day trial.

Erickson was convicted of 46 criminal counts in the shooting at STEM School Highlands Ranch in May 2019. A student, Kendrick Castillo, was killed, and several others were injured.

“May 7, 2019, was every parent’s absolute worst nightmare… I cannot imagine the terror these young students went through, being locked in a room, ambushed by two killers with murder in their hearts,” District Attorney John Kellner said.

“But for all the killer wanted to be the name that was remembered, his name will be forgotten. The name that we remember in this community is Kendrick Castillo. We remember all the brave young students who sprang into action.”

Life in prison without the possibility of parole is Colorado’s mandatory sentence for an adult convicted of first-degree murder.

The following counts were decided upon by the jury:

Murder in the first degree – two counts – GUILTYConspiracy to commit murder in the first degree – GUILTYCriminal attempt to commit murder in the first degree – 31 counts – GUILTYSecond degree arson – GUILTYProviding or permitting a juvenile to possess a handgun – GUILTYThird degree burglary – GUILTYConspiracy to commit second degree arson – GUILTYTheft – GUILTYPossession of a weapon on school grounds – GUILTYCriminal mischief – GUILTYConspiracy to commit criminal mischief – GUILTYConspiracy to commit theft – GUILTYConspiracy to commit third degree burglary – GUILTYInterference with staff, faculty or students of educational institutions – GUILTYReckless endangerment – GUILTY