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HIGHLANDS RANCH, Colo. — A security guard at STEM School Highlands Ranch shot and wounded a female while responding to last month’s deadly shooting.

According to a probable cause affidavit released Thursday, the security guard also fired two rounds at a Douglas County Sheriff’s Office lieutenant.

He then fired the shot that struck a female in a classroom.

“One of the shots fired by the security guard wounded a female in room 106,” the document states. The wounded person’s name is redacted.

The document does not publicly reveal whether the person shot was one of the suspects.

The security guard then reportedly handcuffed the younger shooting suspect and handed the suspect over to deputies.

The suspects, 18-year-old Devon Erickson and 16-year-old Alec McKinney, are alleged to have opened fire with handguns inside the school, killing one classmate and wounding eight others on May 7.

The documents released Thursday also state that the younger suspect targeted students and both did cocaine before the shooting.