Lead: Authorities on Thursday named a person of interest in the fatal shooting that took place at Brown University last weekend and have launched a search for that individual and a rented car investigators believe may link the campus attack to the separate killing of an M.I.T. professor earlier this week. The Brown attack left two students dead and nine others wounded; the professor, Nuno F.G. Loureiro, was found shot at his Brookline home and died after being taken to a hospital. Officials have not publicly identified a suspect in either case and are continuing ballistic, video and witness investigations while urging public tips and offering a reward.
Key Takeaways
- Investigators have identified a new person of interest in the Brown University classroom shooting and are actively searching for the individual and a rented vehicle they believe the person used.
- The Brown attack, on the Saturday before Dec. 18, 2025, killed two students and wounded nine others in a review session in Barus and Holley; the victims include MukhammadAziz Umurzokov and Ella Cook.
- M.I.T. professor Nuno F.G. Loureiro was shot Monday night in Brookline and pronounced dead Tuesday morning; authorities opened a homicide investigation in his death.
- Officials said ballistic evidence and surveillance are being analyzed; Rhode Island authorities released enhanced doorbell-camera compilations of a masked figure seen near campus.
- Authorities have offered a $50,000 reward and asked those in the Barus and Holley building the day of the shooting to come forward for interviews.
- Federal and local investigators are examining whether the rented car connected to the person of interest was at both Brown and the M.I.T. scene; no public confirmation of a definitive link has been made.
Background
Brown’s Barus and Holley building is a central academic hub that houses large lecture halls and laboratories; on the Saturday in question a Principles of Economics review session drew dozens of students preparing for final exams. Review sessions for large introductory classes often attract students from diverse majors, increasing the number of people present and the challenge of securing every space in older campus buildings where interior cameras may be limited. The attacker entered an amphitheater-style classroom and fired, then left the building; the gunman’s face was obscured by a medical mask and dark clothing, and only grainy doorbell and street footage have so far shown a portly figure pacing near the neighborhood east of campus.
Two days after the Brown shooting, police in Brookline, Mass., responded to reports of an adult male shot at his home and later confirmed the death of Nuno F.G. Loureiro, a 47-year-old M.I.T. professor and director of the Plasma Science and Fusion Center. Loureiro was a recognized researcher in plasma physics and magnetic reconnection, and the school described his death as a profound loss; federal and local law enforcement opened a homicide probe. Initially, an FBI official said there “seems to be no connection” between the campus shooting and the Brookline killing, but investigators later said they were exploring whether a rented vehicle tied to a person of interest in Providence matched a car seen in the M.I.T. case.
Main Event
On the Saturday afternoon review session, a teaching assistant leading the class had just finished when gunfire erupted in the hallway. Witnesses say a masked individual entered the lecture hall and began shooting; students fled toward exits or took cover under desks. Two students were killed: 18-year-old MukhammadAziz Umurzokov, who had immigrated from Uzbekistan and planned to study biochemistry and neuroscience, and 19-year-old Ella Cook, a sophomore noted for academic talents and campus involvement. Nine other students were injured, some seriously; eyewitness accounts describe chaotic evacuations and classmates rendering first aid while waiting for emergency responders.
Investigators collected shell casings and large volumes of surveillance footage — which Providence officials described as “terabytes” of video — but internal cameras did not capture the suspect entering the older portion of the building where the classroom sits. Law enforcement released enhanced doorbell-camera clips showing a masked person in dark clothing walking near residences east of the Brown campus beginning hours before the shooting. Authorities said the footage shows posture, gait and arm movements they hope the public will recognize and report.
Two days after the campus attack, Brookline police and the Norfolk County District Attorney announced a homicide inquiry after Dr. Loureiro was found shot at his home Monday night and died the following morning. M.I.T. officials identified Loureiro as director of a major plasma research center and noted his recognition by the Presidential Early Career Awards. Local and federal investigators are coordinating evidence collection at both scenes while cautioning that they have not confirmed a causal link between the incidents.
Analysis & Implications
The search for a person of interest and a rented car underscores two investigative priorities: linking physical evidence across scenes and narrowing a broad set of public videos to a single identifiable individual. Ballistic comparisons, rental records, and enhanced surveillance can yield connecting evidence, but each requires confirmation; rental paperwork and plate traces can take time and may be obscured if a car is returned or altered. The presence of a rented vehicle that matches a car seen in both areas would materially shift the inquiry from separate incidents to potentially linked attacks, raising questions about motive and planning that investigators are pursuing carefully.
Beyond criminal forensics, the incidents expose vulnerabilities in campus security and in residential neighborhoods: older academic buildings frequently lack interior camera coverage, and public-facing doorbell cameras capture partial, low-resolution views that make identification difficult. Universities and municipalities now face pressure to reassess surveillance placement, building access controls, and protocols for high-traffic study spaces, balancing privacy concerns with safety imperatives ahead of exam periods and other times when large groups congregate.
If investigators establish a tie between the Brown shooting and the Brookline homicide, the regional law-enforcement response will likely scale up, combining resources across jurisdictions and prompting broader public alerts about vehicle descriptions and possible travel routes. Conversely, if no link emerges, both cases will remain separate homicide investigations with distinct suspect pools and motives; that outcome would focus attention back on campus security and community support for victims and families rather than on a wider manhunt.
Comparison & Data
| Case | Days to Identification/Capture | Outcome |
|---|---|---|
| Brown University (2025) | Ongoing | 2 dead, 9 wounded; person of interest sought |
| Boston Marathon (2013) | 3 days to suspect photos released | Manhunt; multiple officers wounded |
| United Healthcare CEO case (Luigi Mangione) | 5 days to capture | Suspect arrested |
| Lewiston spree (2023) | >2 days | Suspect found dead of self-inflicted wound |
The table highlights that high-profile searches can vary widely in time to resolution: some yield rapid identification through clear footage or witnesses, while others extend for days even with intense resources. Investigative success often depends on a combination of evidence quality, public tips, rental and financial records, and whether the suspect remains in the immediate area or leaves the jurisdiction.
Reactions & Quotes
Officials emphasized patience and public assistance while refusing to speculate on motive.
“We just need a little bit of patience, as hard as it is to say that in this really horrible context.”
Peter Neronha, Rhode Island Attorney General
Neronha framed the released surveillance compilations as an appeal to the public: posture, gait and minute gestures may help identify the person of interest.
“There seems to be no connection” (initially) between the Brown shooting and the Brookline death, officials said as they opened separate but parallel investigations.
Ted Docks, Special Agent in Charge, FBI Boston
The FBI cautioned the public about premature conclusions while committing federal resources to evidence analysis; their early statement reflected the investigatory posture of considering and then testing potential links.
“This shocking loss for our community comes in a period of disturbing violence in many other places.”
Sally Kornbluth, President, M.I.T.
M.I.T. leaders expressed grief for the Loureiro family and asked the campus community to seek mental-health support as the homicide probe proceeds.
Unconfirmed
- Whether the rented vehicle investigators are seeking is definitively the same car seen near the M.I.T. homicide scene; law enforcement has not publicly confirmed a match.
- Any motive linking the Brown classroom shooting and the Brookline killing remains unestablished; authorities have cautioned against assuming a connection.
- The identity and current whereabouts of the person of interest are unverified; there is no public record of an arrest or positive identification as of the latest update.
Bottom Line
The investigation is at a critical evidence-gathering stage: authorities have a named person of interest and a vehicle description that could connect two violent events, but they have not yet produced conclusive, public evidence tying the incidents together. For families, victims and the university community the immediate priorities are victim care, transparent updates from investigators, and protective measures for other high-density campus spaces.
Prospectively, a confirmed link would broaden the scope of the probe and likely accelerate interagency coordination and public alerts; an absence of connection would focus responses on preventing isolated spree attacks and addressing campus safety gaps. Either way, the coming days of forensic analysis, rental-record tracing and public tips will determine whether this manhunt resolves quickly or remains prolonged.
Sources
- The New York Times live coverage — news (original live reporting cited in this article)