Federal authorities have disclosed new findings in the investigation into the December 2025 mass shooting at Brown University, followed days later by the killing of a Massachusetts Institute of Technology professor, revealing that the attacker meticulously planned the violence over several years and expressed no remorse afterward.
According to the U.S. Attorney’s Office for the District of Massachusetts, transcripts from a series of self-recorded videos show that the gunman, Portuguese national Claudio Manuel Neves Valente, spent multiple academic semesters preparing for the attack. The videos, recorded after the shootings, provide insight into his actions and state of mind but fail to establish a clear ideological or personal motive.
Timeline of the Attacks
The violence began on December 13, 2025, when Neves Valente opened fire inside a university auditorium at Brown University in Providence, Rhode Island. Two students were killed and several others injured during the incident. Authorities say the victims were attending an academic event when the shooting occurred.
Two days later, on December 15, the suspect traveled to Brookline, Massachusetts, where he fatally shot an MIT professor at the professor’s residence. Investigators later confirmed that the professor had no known role in the earlier campus attack, deepening questions about the shooter’s intent.
Discovery of the Confession Videos
The investigation intensified on December 18, when the Federal Bureau of Investigation executed a search warrant at a storage facility in New Hampshire linked to Neves Valente. Inside, agents found the suspect deceased from a self-inflicted gunshot wound.
During the search, investigators recovered an electronic device containing four short videos totaling more than 11 minutes. In these recordings, Neves Valente admitted that he had planned the Brown University shooting for over six semesters, stating that he had previously hesitated but ultimately decided to proceed.
Chilling Details and Lack of Remorse
Officials described the content of the videos as deeply disturbing. Neves Valente reportedly blamed victims for their actions during the attack and made dismissive comments about those who attempted to hide. Prosecutors emphasized that the recordings showed no expression of regret, remorse, or empathy.
In one segment, the suspect criticized the way the attack unfolded, claiming the location did not match his original plan. He also spoke about his escape, acknowledging that surveillance cameras and vehicle records would likely lead authorities to him, yet expressing surprise at how long it took to locate him.
Public Reaction and Ongoing Investigation
The videos also reference media coverage and public reaction following the shootings. Neves Valente commented on statements made by the U.S. President Donald Trump, as well as rumors circulating online about what was said during the attack.
Authorities confirmed that Neves Valente had previously studied at Brown University in the early 2000s before leaving the program. Investigators also noted academic connections between the suspect and the MIT professor who was later killed, though no definitive motive has been established.
Officials stressed that, based on current evidence, there is no ongoing threat to public safety. The investigation into the underlying reasons for the attacks remains open, with federal prosecutors continuing to review digital evidence and personal history to better understand what led to the violence.
Law enforcement agencies also acknowledged that information shared by a member of the public online played a key role in helping authorities identify and track the suspect after the initial shooting.
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