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.

Here’s what we know about the 57-year-old charged with the murders of state representative Melissa Hortman and her husband and shootings of state senator John Hoffman and his wife.

Earlier on Sunday, officials announced that a "nationwide warrant" had been issued for his arrest in connection with the murders and attempted murder under state law.