FBI concludes Brown University gunman plotted massacre for years, blamed his own victims

The man who opened fire in a Brown University lecture hall last December and then killed an MIT professor two days later had been planning the attacks for at least three years, the FBI and the U.S. Attorney’s Office for the District of Massachusetts announced after concluding their investigation. Claudio Manuel Neves Valente, a 48-year-old Portuguese national and legal permanent resident, left behind more than 2,100 audio and video files, and in them, Fox News Digital reported, he blamed the people he attacked rather than himself.

Two Brown students, Ella Cook, 19, and Muhammad Aziz Umurzokov, 18, were killed on December 13, 2025, when Valente walked into Barus and Holley Room 166 during an ECON 0110 review session and opened fire. Nine other people were wounded. Two days later, MIT Professor Nuno Loureiro was shot and killed outside his home in Brookline, Massachusetts.

By December 19, investigators found Valente dead from a self-inflicted gunshot wound at a storage unit he had rented in Salem, New Hampshire. Two 9mm Glock pistols, a Glock 34 used at Brown and a Glock 26 used against Loureiro, were recovered with his body. The FBI said both firearms were legally purchased from a Florida pawn shop, one in 2020 and the other in 2022.

A grudge two decades in the making

The FBI’s Behavioral Analysis Unit found that Valente viewed his victims as “symbolic” targets. Investigators described a man consumed by an “inflated sense of self,” long-term suicidal ideations, paranoia, and what officials called an ongoing “failure to thrive.” He used violence, the bureau concluded, to overcome shame and punish those he felt had contributed to his downfall.

That downfall traced back more than twenty years. Valente and Loureiro first crossed paths in a physics program in Lisbon, Portugal, between 1995 and 2000. Both studied in the same academic program before their paths diverged sharply. Loureiro went on to a distinguished career at MIT. Valente came to the United States on a student visa in 2000 to attend Brown, studied physics alongside Loureiro again from the fall of 2000 through the spring of 2001, and then stalled. Brown confirmed he took a leave in 2001 and formally withdrew by 2003 without a degree.

U.S. Attorney Leah Foley told reporters that Valente “attended the same academic program as the MIT professor, Nuno Loureiro, in Portugal, between 1995 and 2000.” Foley said “there was no doubt” that Loureiro was Valente’s intended target.

A former friend described Valente as “always angry, isolated and overqualified.” In the recordings he left behind, Valente called others “kind of stupid” and said he did not “give a d—“, but he failed to explain why he committed the attacks. He blamed his victims. He offered no coherent justification.

The gap between Valente’s self-image and his reality is worth pausing over. Here was a man who once studied physics alongside a future MIT professor, who came to an Ivy League campus on a student visa, who later obtained a green card, and who ended up driving for a ride-hailing service in Miami. The FBI described him as someone whose sense of entitlement never adjusted to his actual circumstances. Instead of reckoning with his own choices, he spent years meticulously planning to harm people who had nothing to do with those choices.

The scope of the investigation

Federal investigators reviewed more than 11,000 surveillance files, analyzed over 2,100 audio and video files from Valente’s personal devices, and conducted upward of 260 interviews before closing the case. The FBI confirmed the shootings had no connection to terrorism.

Officials believe Valente traveled from the Providence area to Loureiro’s home in Brookline in a rental car, changing license plates during the drive. That detail alone speaks to the degree of premeditation involved, this was not a spontaneous act of rage but a calculated sequence carried out over days, planned over years.

In the immediate aftermath of the Brown shooting, the gunman escaped the campus. Newsmax reported that investigators had identified a person of interest and were actively seeking that individual before Valente’s body was discovered. Rhode Island Attorney General Peter Neronha acknowledged at the time that “there are still ‘a lot of unknowns’ in regard to motive” and that officials did not know “why now, why Brown, why these students and why this classroom.”

The FBI’s conclusion filled in many of those blanks. The “why” was not ideological or political. It was personal, the bitter fixation of a man who believed the world owed him more than he received, directed at people who had the misfortune of representing what he could not become.

The immigration angle the left wants to ignore

Valente first entered the United States on a student visa in 2000. He later obtained permanent legal residency through the diversity visa green card lottery in 2017, a program that admits roughly 50,000 people per year through random selection, with minimal vetting beyond basic eligibility.

The Trump administration moved swiftly after the shootings. Homeland Security Secretary Kristi Noem announced an immediate pause of the diversity visa program through USCIS. The Washington Free Beacon reported Noem’s statement:

“This heinous individual should never have been allowed in our country. At President Trump’s direction, I am immediately directing USCIS to pause the DV1 program to ensure no more Americans are harmed by this disastrous program.”

This was not the first time the diversity visa lottery drew scrutiny after a mass casualty event. The program also admitted the individual responsible for the 2017 New York City truck attack. The pattern raises an obvious question: why does the United States operate a system that selects immigrants by lottery rather than by merit, skill, or demonstrated value to the country? Defenders of the program call it a tool of global equity. The families of Ella Cook and Muhammad Aziz Umurzokov might use different language.

The broader question of how dangerous individuals slip through federal vetting systems is one that keeps resurfacing, whether the threat involves terrorism or, as in this case, a man nursing a decades-long grievance while legally residing in the country.

What the files reveal, and what they don’t

Valente’s storage unit in Salem, New Hampshire, served as something between a staging area and a confessional booth. He stashed weapons there. He recorded himself. In those recordings, he confessed to the killings but, investigators said, never truly explained them. He blamed the people he targeted. He blamed a world that failed to recognize his brilliance. He did not blame himself.

The FBI’s Behavioral Analysis Unit profile paints a picture that will be familiar to anyone who has followed the grim pattern of mass shootings in this country: social isolation, grandiosity, simmering resentment, meticulous planning carried out in secret, and a final act designed to impose maximum harm on people who never wronged the attacker in any meaningful way.

Valente began plotting as early as 2022, the same year he purchased the second Glock. He had been out of Brown for nearly two decades by then. Whatever perceived slight drove him, whether it was academic failure, professional stagnation, or some private humiliation, he let it fester until it consumed him. And then he walked into a room full of teenagers studying for an economics exam.

Ella Cook was 19. Muhammad Aziz Umurzokov was 18. Neither had any connection to Valente’s grievances. Neither had done anything to him. They were, in the FBI’s clinical language, “symbolic.” They were also someone’s children.

Professor Loureiro, by contrast, was a specific target, the man whose career trajectory diverged from Valente’s at the fork where talent met discipline. Loureiro built a life. Valente built a storage unit full of weapons and recordings. The contrast is its own verdict.

The case also raises hard questions about what, if anything, could have been detected earlier. Valente legally purchased both firearms years before the attack. He had no known terrorism ties. His planning was conducted in isolation. The forensic and investigative tools that eventually connected the dots did so only after the damage was done.

Accountability and its limits

Valente is dead. There will be no trial, no sentencing, no opportunity for the families of the victims to face the man who destroyed their lives. The FBI’s investigation is closed. The facts are on the record. The policy debate, over the diversity visa lottery, over campus security, over whether a system designed to welcome the world can adequately screen for the rare individual who enters with a grudge and a timeline, will continue.

What the investigation makes clear is that this was not a case of sudden psychotic break or spontaneous violence. It was years of deliberate preparation by a man who believed his failures were everyone else’s fault. He had access to the country through a program that asked little of him. He had access to firearms through legal purchases. He had access to a campus that, like most American universities, operates on the assumption that the people walking through its doors mean no harm.

Every one of those access points deserves scrutiny, not in a spirit of panic, but in the plain recognition that preventing the next attack requires honest assessment of how this one happened.

Valente blamed his victims. The rest of us should blame the gaps in a system that gave a bitter, isolated man every opportunity and no oversight, for more than twenty years.