FBI says Brown shooting suspect acted alone, driven by grievances

Investigators say the Brown University attack and the killing of MIT Professor Dr. Nuno Loureiro were not random eruptions of violence, but the end point of a long record of grievance, fixation and planning. The FBI and the U.S. Attorney’s Office for the District of Massachusetts said on April 29, 2026, that Claudio Manuel Neves Valente, 48, acted alone, had no nexus to terrorism, and targeted symbolic victims after what agents described as an accumulation of grievances collected over his life.

The case has now been built around an increasingly detailed portrait of preparation rather than spontaneity. Federal investigators said they recovered more than 112 pieces of evidence, followed up more than 490 leads, reviewed more than 11,000 surveillance files, analyzed 815 videos and 1,327 audio files from the suspect’s electronic devices, and conducted more than 260 interviews. Earlier Justice Department disclosures had already said he had been planning the Brown attack for at least six semesters, and short videos recovered by investigators showed him saying in Portuguese that he had been planning the shooting for a long time and had no remorse.

Valente was born in Torres Novas, Santarem, Portugal, and first came to the United States in August 2000 on a student visa to attend Brown after studying physics at Instituto Superior Técnico in Lisbon. He enrolled in Brown’s doctoral program that fall, withdrew in May 2001, and later left the country. He became a lawful permanent resident in 2017 while living in Miami, where he briefly worked as a rideshare driver. At the time of the shootings, he was unemployed, had no criminal record and had no prior documented contact with law enforcement.

Authorities said Valente legally bought the two 9mm pistols later recovered with his body in Salem, New Hampshire. The Glock 34, purchased on July 19, 2020, was used in the Brown shooting in Providence on December 13, 2025. The Glock 26, purchased on March 22, 2022, was positively linked to Loureiro’s murder two days later in Brookline, Massachusetts. Two Brown students were killed in the campus attack, including Ella Cook and MukhammadAziz Umurzokov, and nine others were wounded in the engineering building.

The new findings sharpen a question now pressing on Brown and beyond: what does an accumulation of grievances mean in practice, and when do institutions recognize it? Three injured Brown students sued the university in April, alleging negligence and lax building security, arguing there were missed chances to prevent the shooting. The FBI’s findings suggest the warning signs did not look like a single alarm bell, but a slow escalation that moved through years of resentment, planning and isolation before it turned lethal.