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Brown University shooting turns finals week into a citywide manhunt — and a long, painful reckoning

Brown University shooting turns finals week into a citywide manhunt — and a long, painful reckoning

Force in Play

Victims are named and the initial detainee is cleared, but the shooter remains at large as investigators probe a possible link to the killing of an MIT professor.

December 18th, 2025: Police publish a more detailed camera timeline of the masked suspect’s route near campus

Overview

Brown's Dec. 13 shooting evolved from a campus lockdown into an extended manhunt. Gunfire killed two students—Ella Cook and Mukhammad Aziz Umurzokov—and wounded nine others; the initially detained suspect was released, and investigators have used residential and vehicle-camera footage to track the shooter's movements.

The stakes widened midweek when authorities began probing a possible connection to the fatal shooting of MIT professor Nuno F.G. Loureiro in Brookline, Massachusetts. With the suspect unidentified and the search multi-state, Brown is restoring routines, including releasing delayed early-decision admissions, while facing a harder question: what does "open campus" mean when violence is mobile, masked, and potentially multi-site.

Play on this story Voices Debate Who Said What? Predict

Key Indicators

2
Students killed
Brown identified the victims as Ella Cook and Mukhammad Aziz Umurzokov.
9
People wounded by gunfire
Nine students were wounded; officials have continued issuing condition updates as some victims are discharged.
0
Suspects in custody
The original detainee was released; police continue to search for the masked shooter.
1
Possible linked homicide under review
Investigators are examining a potential connection to the killing of MIT professor Nuno Loureiro in Brookline, Massachusetts.

Voices

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People Involved

Christina H. Paxson
Christina H. Paxson
Continuing crisis leadership as the shooter remains at large; publicly identified the two slain students and addressed ongoing disruptions to campus operations
 Brett Smiley
Brett Smiley
Managing public-safety posture and public anxiety as the manhunt stretches into a second week and the investigation potentially broadens beyond Rhode Island
 Oscar Perez
Oscar Perez
Leading an expanding investigation relying on neighborhood footage and public tips; authorities are now also assessing a possible link to the killing of an MIT professor
 Timothy O'Hara
Timothy O'Hara
Public briefings on suspect description and evidence collection
 Dan McKee
Dan McKee
State-level crisis response; political spotlight on gun laws and public safety
 Person of interest (name not released)
Person of interest (name not released)
Detained early Dec. 14; authorities declined details publicly
 Nuno F.G. Loureiro
Nuno F.G. Loureiro
Killed in Brookline, Massachusetts; investigators are examining a potential link to the Brown University shooting

Organizations Involved

Brown University
Brown University
University
Balancing a prolonged manhunt and trauma response with pressure to resume normal operations (including admissions and exams logistics)

Brown is now balancing open-campus culture with post-shooting security reality.
Providence Police Department
Providence Police Department
Local Law Enforcement Agency
Continuing multi-agency manhunt and evidence reconstruction using residential security footage; investigation now includes reviewing a potential link to a separate homicide in Massachusetts

Providence police ran the manhunt, the briefings, and the handoff into prosecution.
Federal Bureau of Investigation (FBI)
Federal Bureau of Investigation (FBI)
Federal Law Enforcement Agency
Assisted with manhunt and investigative support

The FBI joined the response as federal support for a major public-safety incident.
Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)
Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)
Federal Agency
Assisted with firearms-related investigative support

ATF support points to an early focus on weapon sourcing and ballistics.
Brown University Health
Brown University Health
Healthcare System
Reported patient conditions and treated victims

Hospitals became the second battlefield: triage, surgeries, and family reunification.
Massachusetts Institute of Technology (MIT)
Massachusetts Institute of Technology (MIT)
University
Community impacted by professor’s killing; case now being reviewed for potential connection to Brown shooting

MIT entered the story after professor Nuno Loureiro was killed in Brookline, prompting investigators to examine a possible link to the Brown University shooting.

Timeline

10 events Latest: December 18th, 2025 · 5 months ago
Tap a bar to jump to that date

  1. Police publish a more detailed camera timeline of the masked suspect’s route near campus

    Latest Investigation

    Authorities described footage showing a masked person moving through nearby streets hours before the attack and calmly walking away moments after, underscoring how heavily the case now relies on neighborhood cameras and public tips.

  2. Investigators probe possible link to killing of MIT professor; Reuters reports suspect identified

    Investigation

    Authorities began examining whether the Brown shooting connects to the fatal shooting of MIT professor Nuno Loureiro in Brookline; Reuters reported investigators had identified a suspect (not publicly named) and related police activity was seen in Salem, New Hampshire.

  3. Brown releases delayed early-decision admissions as manhunt drags on

    Statement

    The university proceeded with early-decision notifications after delaying them, acknowledging applicant anxiety while the shooter remained at large.

  4. Brown names the two slain students; hospitals continue condition updates

    Statement

    President Christina Paxson identified the victims as Ella Cook and Mukhammad Aziz Umurzokov as the campus remained in a prolonged state of disruption and trauma response.

  5. Person of interest detained; shelter order lifted

    Investigation

    Police say they’re not seeking others; some streets stay closed for evidence work.

  6. First 911 calls reported near Barus & Holley

    Force in Play

    Gunfire triggers emergency calls as finals activity continues nearby.

  7. Brown issues active-shooter alert and lockdown

    Statement

    Students told to lock doors, silence phones, and stay hidden.

  8. Casualties confirmed; victims identified as students

    Force in Play

    Officials confirm two deaths and multiple injuries from gunfire.

  9. Citywide shelter-in-place and massive search begins

    Investigation

    Hundreds of officers fan out across campus and nearby neighborhoods.

  10. Surveillance video released of suspect figure

    Investigation

    Authorities release footage seeking tips; suspect described as dressed in black.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

2022-11

University of Virginia shooting

A shooting killed students and triggered a campus lockdown and intensive search. The case quickly moved from manhunt to questions about warnings, accountability, and institutional response.

Then

Suspect was identified and taken into custody; classes and events were disrupted.

Now

The university faced sustained scrutiny over safety protocols and threat reporting.

Why this matters now

Shows how the headline shifts fast—from capture to institutional responsibility.

2023-02

Michigan State University shooting

A gunman killed students and wounded others, forcing mass sheltering and a multi-agency response. The aftermath centered on trauma care, campus reopening, and renewed gun-policy conflict.

Then

Campus shut down; vigils and emergency support surged.

Now

The shooting remained a political flashpoint, with persistent debates over prevention.

Why this matters now

A template for the emotional and political aftershocks Brown is entering now.

2007-04

Virginia Tech shooting

One of the deadliest U.S. campus shootings exposed failures in communication and threat response. It became a national reference point for how universities build emergency alert systems.

Then

Sweeping investigations and institutional reforms followed.

Now

Campus emergency notification and active-shooter protocols changed nationwide.

Why this matters now

Explains why Brown’s alerts, timelines, and decisions will be dissected for years.

Sources

(11)
+5
Reuters Associated Press The Washington Post CBS News The Brown Daily Herald ABC News / Associated Press Reuters The Washington Post Associated Press Associated Press Reuters