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Adult suspect in STEM school shooting pleads not guilty at arraignment

Posted at 2:20 PM, Jan 02, 2020

CASTLE ROCK, Colo. – The adult suspect in last year's STEM School Highlands Ranch shooting pleaded not guilty during his arraignment in Douglas County District Court on Thursday.

Devon Erickson, 19, faces 44 felony counts, including two separate counts of first-degree murder along with dozens of other counts of attempted first-degree murder. He also faces several misdemeanors.

Erickson's attorneys also entered a notice to introduce possible evidence of Erickson's mental condition, though the attorneys had asked for more time before making the notice. Because of the notice, Erickson will now be evaluated by a psychiatrist at either the county jail or a state mental health facility.

Kendrick Castillo, an 18-year-old senior at the STEM school, died in the shooting and eight others were injured.

Erickson's attorneys have argued that he was forced into the shooting by alleged co-conspirator Alec McKinney, 16-year-old student at the school. A judge ruled last month that McKinney will be tried as an adult in the case.

McKinney also faces dozens of charges, including murder, in the shooting.