Boelter allegedly had firearms and a list of 45 elected officials in notebooks in his car, law enforcement said.

Boelter, 57, was arrested at about 9 p.m. June 15. He is accused of shooting the two Democratic state legislators and their spouses in the early morning hours of June 14. The Minnesota State Patrol took him into custody in rural Sibley County, roughly 50 miles southwest of Minneapolis.