PROVIDENCE, R.I. (AP) — When a gunman began firing inside an academic building on the Brown University campus, students didn’t wait for official alerts warning of trouble. They got information almost instantly, in bits and bursts — through phones vibrating in pockets, messages from strangers, rumors that felt urgent because they might keep someone alive.
On Dec. 13 as the attack at the Ivy League institution played out during finals week, students took to Sidechat, an anonymous, campus-specific message board used widely at U.S. colleges, for fast-flowing information in real time.
An Associated Press analysis of nearly 8,000 posts from the 36 hours after the shooting shows how social media has become central to how students navigate campus emergencies.
This combo image made with photos provided by the FBI and the Providence, Rhode Island, Police Department shows a person of interest in the shooting that occurred at Brown University in Providence, R.I., Saturday, Dec. 13, 2025. (FBI/Providence Police Department via AP)
This combo image made with photos provided by the FBI and the Providence, Rhode Island, Police Department shows a person of interest in the shooting that occurred at Brown University in Providence, R.I., Saturday, Dec. 13, 2025. (FBI/Providence Police Department via AP)
Fifteen minutes before the university’s first alert of an active shooter, students were already documenting the chaos. Their posts — raw, fragmented and sometimes panicked — formed a digital time capsule of how a college campus experienced a mass shooting.
As students sheltered in place, they posted while hiding under library tables, crouching in classrooms and hallways. Some comments even came from wounded students, like one posting a selfie from a hospital bed with the simple caption: #finalsweek.
Law enforcement officers are seen outside a storage facility where a suspect in the shooting at Brown University was found dead, Dec. 18, 2025, in Salem, N.H. (AP Photo/Reba Saldanha, File)
Law enforcement officers are seen outside a storage facility where a suspect in the shooting at Brown University was found dead, Dec. 18, 2025, in Salem, N.H. (AP Photo/Reba Saldanha, File)
Others asked urgent questions: Was there a lockdown? Where was the shooter? Was it safe to move?
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It would be days before authorities identified the suspect and found him dead in New Hampshire of a self-inflicted gunshot wound, later linking him to the killing of a Massachusetts Institute of Technology professor.
Here’s a look at how the shooting unfolded.
Stream of collective consciousness
Described by Harvard Magazine as “the College’s stream of collective consciousness,” Sidechat allows anyone with a verified university email to post to a campus feed. On most days, the Brown feed is filled with complaints about dining hall food, jokes about professors and stress about exams — fleeting posts running the gamut of student life.
On the Saturday afternoon just before the shooting, a student posted about how they wished they could “play Minecraft for 60 hours straight.” Then, the posts abruptly shifted.
A poster seeking information about the campus shooting suspect is seen on the campus of Brown University, Dec. 17, 2025, in Providence, R.I. (AP Photo/Robert F. Bukaty, File)
A poster seeking information about the campus shooting suspect is seen on the campus of Brown University, Dec. 17, 2025, in Providence, R.I. (AP Photo/Robert F. Bukaty, File)
Crowds began pouring out of Brown’s Barus and Holley building, and someone posted at 4: 06 p.m.: “Why are people running away from B&H?”
Others quickly followed. “EVERYONE TAKE COVER,” one wrote. “STAY AWAY FROM THAYER STREET NEAR MACMILLAN 2 PEOPLE JUST GOT SHOT IM BEING DEAD SERIOUS,” another user wrote at 4: 10 p.m.
Dozens of frantic messages followed as students tried to fill the information gap themselves.
“so r we on lockdown or what,” one student asked.
By the time the university alert was sent at 4: 21 p.m., the shooter was no longer on campus — a fact Brown officials did not yet know.
“Where would we be without Sidechat?” one student wrote.
A university spokesperson said Brown’s alert reached 20,000 people minutes after the school’s public safety officials were notified shots had been fired. Officials deliberately didn’t use sirens to avoid sending people rushing to seek shelter into harm’s way, said the spokesperson, Brian E. Clark, who added Brown commissioned two external reviews of the response with the aim of enhancing public safety and security.
Long hours of hiding
Long after the sun had set, students sheltered in dark dorm rooms and study halls. Blinds were closed. Doors were barricaded with dressers, beds and mini fridges.
“Door is locked windows are locked I’ve balanced a metal pipe thing on the handle so if anyone even tries the handle from the outside it’ll make a loud noise,” one student wrote.
Students reacted to every sound — footsteps in hallways, distant sirens, helicopters overhead. When alerts came, the vibrations and ringtones were jarring. Some feared that names of the dead would be released — and that they would recognize someone they knew.
People hold candles during a vigil, Dec. 14, 2025, in Providence, R.I., for the victims of Saturday’s shooting on the campus of Brown University. (AP Photo/Steven Senne, File)
People hold candles during a vigil, Dec. 14, 2025, in Providence, R.I., for the victims of Saturday’s shooting on the campus of Brown University. (AP Photo/Steven Senne, File)
Law enforcement moved through campus buildings, clearing them floor by floor.
A student who fled Barus and Holley asked whether anyone could text his parents to let them know he had made it out safely. Others said they had left phones behind in classrooms when they fled, unable to reach frantic loved ones. Ironically, those closest to the shooting often had the least information.
Many American students expressed emotions hovering between numbness and heartbreak.
“Just got a text from a friend I haven’t spoken to in nearly three years,” one student wrote. “Our last messages? Me checking in on her after the shooting at Michigan State.” Multiple students replied, saying they’d had similar experiences.
International students posted about parents unable to sleep on the other side of the world.
“I just want a hug from my mom,” one student wrote.
Anxiety sets in
As the hours dragged on, students struggled with basic needs. Some described urinating in trash cans or empty laundry detergent bottles because they were too afraid to leave their rooms. Others spoke of drinking to cope.
“I was on the street when it happened & suddenly I felt so scared,” one student wrote. “I ran and didn’t calm down for a while. I feel numb, tired, & about to throw up.”
Photos of Brown University shooting victims Mukhammad Aziz Umurzokov, left, and Ella Cook, are seen amongst flowers at a makeshift memorial at the school’s Van Wickle Gate, Dec. 17, 2025, in Providence, R.I. (AP Photo/Robert F. Bukaty, File)
Photos of Brown University shooting victims Mukhammad Aziz Umurzokov, left, and Ella Cook, are seen
