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.

Police stand at a crime scene as they searched for a suspect posing as a police officer who shot two Democratic state lawmakers and their spouses in their homes, in the Minneapolis suburb of Champlin,...

Authorities are searching for a 57-year-old man whom they suspect of killing the Minnesota lawmaker and her husband.