Homicide investigators are searching for the person responsible for the fatal shooting of a Massachusetts Institute of Technology professor at his home in Brookline.

The suspect was a former Brown PhD student, and officials believe he went to school in Lisbon with the slain MIT professor.

BROOKLINE, Mass. — Officials have identified the man who was shot to death in his Brookline home. According to police, around 8:33 p.m., officers responded to 9 Gibbs Street for reports of gunshots. Upon arrival, they discovered Nuno F.G. Loureiro, 47, who had been shot multiple times in the foyer.