The parents of the suspect in the Brown and M.I.T. killings had not seen or heard from him since he left Portugal to enroll at a graduate program at Brown more than two decades ago.
Claudio Neves Valente and Nuno Loureiro, the M.I.T. professor he is accused of killing, were classmates at the University of Lisbon’s Instituto Superior Técnico from 1995 to 2000.
A single suspect carried out the shooting at Brown University and the killing of an M.I.T. professor, and was later found dead in New Hampshire, authorities said.
Officials identified a man from Portugal as the suspect in the deadly shooting at Brown University and the killing of an M.I.T. professor. The police said he died from a self-inflicted gunshot.