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.

A day after police say a gunman killed a Minnesota state lawmaker and her husband, plus wounded another lawmaker and his wife, suspect Vance Boelter remains on the run.

Authorities displayed a photo of Boelter wearing a tan cowboy hat that was taken Saturday and asked the public to report sightings.