Vance Boelter was arrested and charged with two counts of murder and two counts of attempted murder.  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. They were injured at their residence about 9 miles away.