Here's what to know about the criminal charges filed against Vance Boelter, accused of killing Rep. Melissa Hortman and her husband, Mark.

The shooting occurred in their home outside Minneapolis, Minn., in the early hours of June 14. Boelter also allegedly shot Democratic Sen. John Hoffman and his wife, Yvette, in their home, but both of them survived the assassination attempt.

Vance Boelter is accused of posing as a police officer and fatally shooting former Democratic House Speaker Melissa Hortman and her husband, Mark, in their home early Saturday in the northern Minneapolis suburbs. Authorities say he also shot Sen. John Hoffman, a Democrat, and his wife, Yvette, at their home in a nearby neighborhood.