The suspect accused of assassinating a Minnesota lawmaker and shooting another this weekend drove to the homes of at least four state politicians as part of a carefully planned attack, federal authorities said on Monday.

A man accused of killing a Democratic state lawmaker while posing as a police officer is expected to appear in a Minnesota court on Monday afternoon on state murder charges. Vance Boelter, 57, is being held in Hennepin County after he was arrested on Sunday following a massive manhunt over the weekend.

Prosecutors say Vance Boelter was wearing a "hyperrealistic silicone mask" to disguise his identity when he approached.

Minnesota authorities arrested Vance Boelter, the suspect in the assassination of Democratic state Rep. Melissa Hortman and her husband and the failed assassination attempt of Democratic state Sen. John Hoffman and his wife,

The extensive manhunt across Minnesota has culminated in the arrest of 57-year-old Vance Boelter, who now faces serious charges including two counts of murder and two counts of attempted murder. The suspect is alleged to have fatally shot Melissa Hortman,