Vance Boelter , the man accused of assassinating two Minnesota lawmakers and wounding two others, pleaded not guilty to murder charges.

Boelter's lawyer entered a not guilty plea during his Thursday arraignment, according to the Associated Press. Boelter spoke briefly to acknowledge the charges and thank the judge.

On July 15, Boelter was indicted by a federal grand jury on charges including murder , stalking, and possession of a firearm. He also faces state charges of two counts of second-degree murder and two counts of attempted second-degree murder, as well as federal stalking and firearms charges.

Boelter is accused of shooting Democratic Minnesota state Sen. John Hoffman nine times and his wife, Yvette, eight times after showing up at their door dressed as a police offi

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