Hennepin County's chief prosecutor, Mary Moriarty, said at a news conference on Monday (June 16) that her office would seek first-degree murder charges against Vance Boelter, a man accused of killing a Democratic state lawmaker while posing as a police officer.

Heavily armed and dressed in tactical armor with a silicone mask hiding his face and a police-style badge, Vance Boelter made a convincing police officer – so much so that a real police officer mistook him for a fellow cop.

New details about Vance Boelter, accused of fatally shooting a state lawmaker and her husband, were revealed in court documents.

Surveillance footage captured an attempted murder, according to charges unsealed Sunday: A man wearing a mask, a blue shirt and police-style tactical vest with a badge knocked on a door in Champlin and announced himself as a police officer. He then entered the house and shot Minnesota Sen. John Hoffman and his wife.

A lifelong friend of the alleged Minnesota gunman says Vance Boelter had been struggling to find work and was wrestling with a “darkness that was inside of him” at the time of the shootings