Brown University shooter identified as Claudio Manuel Neves-Valente; suspect found dead in New Hampshire storage unit after MIT professor murder
A multi-state manhunt concluded Dec. 18, 2025, when federal agents found Claudio Manuel Neves-Valente — identified as the suspect in the Brown University classroom shooting that killed two students and the subsequent slaying of MIT professor Nuno F.G. Loureiro — dead.
Key takeaways
- Suspect identified: Claudio Manuel Neves-Valente, 48, a Portuguese national linked to both the Brown University attack and the MIT professor’s murder (Fox News, CBS News).
- Manhunt ended: Federal agents found Neves-Valente dead from an apparently self-inflicted gunshot wound in a Salem, New Hampshire, storage unit on Dec. 18, 2025.
- Ongoing investigations: Authorities continue to review travel, communications, financial records and possible federal charges tied to weapons transport and interstate activity.
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Details of the Brown University classroom shooting
What happened: On Dec. 13, 2025, a gunman opened fire inside a classroom in the Barus and Holley engineering building at Brown University. Investigators say more than 40 rounds from a 9mm handgun were fired. Two students were killed and nine others were wounded. The shooter fled on foot after the attack, prompting a broad, multi-jurisdictional search.
MIT professor murder in Brookline
Two days later, on Dec. 15, 2025, Nuno F.G. Loureiro, an MIT professor and scientist known for work in nuclear fusion, was found dead at his Brookline, Massachusetts, home. Federal prosecutors later said evidence tied Neves-Valente to Loureiro’s killing, and U.S. Attorney Leah B. Foley publicly linked the suspect to both attacks (Fox News, CBS News).
Background and connections to institutions
Brown University officials said Neves-Valente attended the university’s physics program from fall 2000 to spring 2001, later taking a leave of absence and ultimately withdrawing in 2003, Brown President Christina Paxson said at a news briefing (Fox News).
Authorities also reported Neves-Valente studied in Portugal in the same academic program as Nuno Loureiro from 1995 to 2000. Investigators have noted the shared academic background while probing possible links between the suspect and Loureiro, but officials have not released a confirmed motive (Fox News, CBS News).
Immigration and residency details
Homeland Security officials said Neves-Valente entered the United States in 2017 through the diversity visa lottery program and later received a green card. His last known address was listed in Miami, Florida, according to statements relayed by federal authorities (Fox News, CBS News).
Investigative leads: rental car, footage and witness accounts
Investigators traced a rental car to a Boston-area rental company. Surveillance footage and rental records placed that vehicle near Brown University from Dec. 1 to Dec. 12. Financial records and hotel charges linked the suspect to stays in the area in early December. Surveillance also placed the vehicle near Loureiro’s apartment, and a witness-reviewed video helped police identify key movements. Those findings formed part of a chain of evidence that guided the manhunt (Fox News, CBS News).
Manhunt, storage unit breach and death
On the evening of Dec. 18, federal agents executed a search at a storage facility in Salem, New Hampshire. Surveillance footage reportedly showed Neves-Valente entering the facility, and his abandoned car was registered to an address tied to him. At about 9 p.m., agents breached a storage locker and found Neves-Valente dead from an apparently self-inflicted gunshot wound. Providence Police Chief Oscar L. Perez Jr. publicly identified him after the discovery (Fox News, CBS News).
Federal charges and additional probes
Federal authorities said they were investigating whether Neves-Valente transported a firearm and ammunition across state lines with intent to commit a felony. Additional charges were expected to be referred by federal prosecutors as the investigation continued. Officials said they will review travel, communications, and other records to establish timelines and motive (Fox News).
Motive and profile
No confirmed motive: Investigators have not publicly identified a clear motive. Officials described Neves-Valente as possibly isolated and paranoid about media coverage, based on initial interviews and early investigative analysis. Authorities cautioned the public that work remains to confirm why the attacks occurred and whether any warning signs were missed (Fox News).
“Investigators will continue to review travel, communications and financial records to build a fuller picture of planning and motive.”
Victim support and university response
Brown University officials and local authorities offered counseling and support services to students and staff after the attack. MIT and the broader academic community expressed shock at the loss of Professor Loureiro, noting his contributions to fusion research. University leaders said they would cooperate fully with federal investigators and review campus safety measures in the days ahead (Fox News, CBS News).
Implications for San Diego, California
Economic impact: San Diego hosts major universities, research centers and a growing tech sector that collaborates with national labs. The killings at a prominent research university and the murder of an MIT professor reverberate through the U.S. research community and may prompt local institutions to increase security spending.
Political consequences: The case is likely to reignite debates about gun safety, campus security and immigration policy. Local leaders may call for balanced responses: targeted safety measures on campus, expanded mental health services, and reviews of background checks and gun transport across state lines.
Social and cultural effects: The shootings can deepen anxiety among students, faculty and families. Community leaders should guard against stigmatizing immigrant groups — the suspect was a Portuguese national — while ensuring public safety and supporting survivors.
Practical steps for residents: Students and families should review emergency plans, know campus alert systems and counseling resources. Employers — especially research labs and biotech firms — may review visitor policies, access controls and delivery screening procedures.
Reporting and next steps
Federal authorities said their work is not finished. Investigators will continue to review Neves-Valente’s travel, communications and financial records to build a fuller picture of planning and motive. Local and federal officials expect to coordinate on evidence and any federal charges that might be filed. Families of victims and university communities await further briefings and the release of official investigative findings (Fox News, CBS News).
