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Army Veteran, Gunman in Colorado Shooting, had History of Mental Illness

By Debbie Gregory.

He was once a standout student in law school and an Army medic. But in the very early morning hours on New Year’s Eve, 37-year-old Matthew Riehl shot four sheriff’s deputies who responded to a complaint at his apartment in the Denver suburb of Highlands Ranch, killing Sheriff’s Deputy Zackari Parrish.

At 5:15 a.m, law enforcement was called out to the apartment to investigate a complaint of a “verbal disturbance” involving two men. One of the men told them the suspect “was acting bizarre and might be having a mental breakdown” but the deputies found no evidence of a crime.

They were called back less than an hour later and came under fire almost immediately after entering the apartment and trying to talk with the suspect, who was holed up inside a bedroom. They were forced to retreat.

Riehl was killed during the subsequent shootout with a police tactical team that left a SWAT officer injured.

Deputy Parrish, 29, leaves behind his wife Gracie and two young daughters.

Riehl enlisted in the Army Reserves in 2003, and in 2006 he joined the Wyoming Army National Guard. He deployed as part of Operation Iraqi Freedom from April 2009 to March 2010. He was honorably discharged in 2012.

Riehl had a history of mental issues, and had escaped from a veterans mental health ward in 2014 during a stay for a psychotic episode. His mother told authorities that her son had post-traumatic stress disorder from his Iraq war deployment and was refusing to take his medication to treat the condition.

By mid-2016, Riehl was at the center of a string of worrisome events reported by police in Colorado and Wyoming. He posted tirades on social media about the faculty at the Wyoming law school and sent harassing emails to police after getting a speeding ticket.

Riehl posted videos criticizing Colorado law enforcement officers in profane, highly personal terms. He also used social media to livestream the confrontation leading up to the shooting.

Military Connection salutes and proudly serves veterans and service members in the Army, Navy, Air Force, Marines, Coast Guard, Guard and Reserve,  and their families.

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