Police identified the 43-year-old man who killed three students and wounded five at Michigan State University, saying Tuesday that a tip from the public led to a confrontation with officers miles from campus where the gunman fatally shot himself.

Investigators still were sorting out why Anthony McRae fired inside Berkey Hall and the MSU Union — a popular place for students to eat and study — shortly before 8:30 p.m. Monday. The shootings led to a campus lockdown and a manhunt that ended roughly three hours later.