MIT Professor’s Murder Linked to Brown University Shooting
Brookline, Mass. – Latest details have emerged regarding the murder of Massachusetts Institute of Technology (MIT) professor Nuno Loureiro, 47, who was shot and killed at his home in Brookline on December 15, 2025. Investigations have linked his death to Claudio Manuel Neves Valente, 48, a Portuguese national who committed a mass shooting at Brown University two days prior.
The Attack on Nuno Loureiro
According to police reports released by the Brookline Police Department, the attack occurred shortly after 8:33 p.m. At Loureiro’s residence on Gibbs Street. The doorbell rang repeatedly, and when Loureiro went to investigate, he was shot multiple times in the chest, abdomen, and legs. Despite the efforts of Brookline police officers who applied immediate medical aid, Loureiro died at Beth Israel Deaconess Medical Center early the next morning at 5:50 a.m. Boston 25 News
Suspect Description and Vehicle
Loureiro’s 12-year-ancient daughter briefly opened the apartment door before her father intervened and provided a description of the assailant to police. The suspect was described as a male, believed to be of Indian descent, in his mid-30s, approximately 5’8”–6’0” tall with a medium build. He was wearing a yellow reflective vest, dark blue clothing, and a winter hat, and was carrying what appeared to be an 11-by-11-inch cardboard package. Boston 25 News
The suspect fled in a blue or gray Nissan sedan, speeding down Gibbs Street toward Stedman Street. Surveillance footage captured the vehicle with its headlights off, traveling through multiple towns west of Boston, including Brighton, Allston, Watertown, and Waltham. The car was last recorded passing a Sunoco gas station on Route 20 around 9:06 p.m. Boston 25 News
Connection to Brown University Shooting
Authorities identified Claudio Manuel Neves Valente as the perpetrator of both the murder of Nuno Loureiro and the mass shooting at Brown University on December 13, 2025, where two students were killed and nine others injured. ABC News Valente and Loureiro had previously attended the same academic program in Portugal between 1995 and 2000, suggesting a possible motive rooted in a long-standing grudge. ABC News
Investigation and Suspect’s Death
A six-day manhunt ensued following the shootings. Valente was found dead inside a storage unit at Extra Space storage facility in Salem, New Hampshire, having died by suicide. Boston 25 News The investigation involved multiple agencies, including the Massachusetts State Police, Norfolk County DA’s Office, and the FBI. Boston 25 News
Nuno Loureiro’s Background
Nuno Loureiro was a renowned plasma physicist and the Herman Feshbach Professor of Physics at MIT. He also served as the director of the MIT Plasma Science and Fusion Center from 2024 until his death. Wikipedia Colleagues at MIT described him as well-liked and highly respected. Boston 25 News
Authorities continue to investigate the full extent of the connection between Valente and Loureiro, and a clear motive remains under investigation.