He’s charged in the slaying of Rep. Melissa Hortman and her husband, and the shooting of Sen. John Hoffman and his wife.

Vance Boelter, the suspected assassin accused of gunning down two Minnesota lawmakers and their spouses, killing one couple, is expected to plead not guilty during his arraignment in federal court

Vance Boelter, 58, of Green Isle, Minnesota, was indicted July 15 on six counts of murder, stalking, and firearms violations.