MINNEAPOLIS—The suspect in the shooting of Minnesota lawmakers on Saturday was feeling down and unhappy with his work situation, but showed no signs that he could turn violent, his self-described best friend and part-time roommate said.

Drew Evans, the superintendent of the Minnesota Bureau of Criminal Apprehension, said “we will be in a position where we’ll be able to develop the motivation behind these attacks and we’ll be able to provide more information as this unfolds.

Minnesota officials said they are searching for Vance Luther Boelter, who was last seen in the Twin Cities area.