Mario Green (left),Anthony Lee-Lamont Barnett

Mario Dewayne Green, 53, of Detroit, was arraigned Monday on charges including first-degree premeditated murder in the fatal shooting last Friday of his ex-wife at Henry Ford Hospital, where she worked.

Anthony Lee-Lamont Barnett, 54, was also charged Monday with accessory after the fact and lying to a police officer for allegedly helping Green flee the scene after the shooting.

Authorities said that around 9:45 a.m. on Friday, Green entered the hospital even though he knew he was prohibited from being there because of past stalking and harassment of his ex-wife, Latricia Green.

Green went to his ex-wife's office in the basement of the hospital and fatally shot her, the Wayne County Prosecutor's Office alleges. She was pronounced dead a sho

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