Vance Boelter, 57, has been charged in the shootings of two Minnesota lawmakers and their spouses. The Hennepin County Attorney said Monday that her office intends to pursue first-degree murder charges against him as well.

The FBI revealed during a separate conference Monday morning that Boelter had gone to the homes of two other Minnesota lawmakers the night he killed Rep. Melissa Hortman and her husband and injured Sen.

Boelter was arrested in a field located in a rural part of Sibley County, in southwest Minneapolis, and he was being interviewed at a law enforcement facility, Drew Evans, the superintendent of the state’s Bureau of Criminal Apprehension, said.