Student shot inside Maryland high school, suspect in custody: Police

(BOSTON) — Nearly two days after a Massachusetts Institute of Technology professor was shot and killed at his home in upscale Brookline, Massachusetts, investigators have no obvious suspects and no working theory of the case, according to multiple sources briefed on the investigation. 

Nuno F.G. Loureiro, 47, was found at his house on Monday night. He was taken to the hospital with gunshot wounds and was pronounced dead on Tuesday, the Norfolk District Attorney’s office said.

Authorities have investigated whether his death could be connected to this weekend’s Brown University shooting, and a senior law enforcement official briefed on both cases told ABC News there is nothing to suggest they’re connected.

Sources said investigators are trying to move quickly, aware the suburban community of Brookline — in which violent crime is rare — is shaken, sources said.

Brookline Police Chief Jennifer Paster said the department will have a police presence in the neighborhood as the investigation continues.

“The Brookline Police Department remains committed to pursuing justice and ensuring the safety of our community,” Paster added.

The university said Loureiro was a “faculty member in the departments of Nuclear Science & Engineering and Physics, as well as the Director of MIT’s Plasma Science and Fusion Center.”

Loureiro, a native of Portugal, wanted to be a scientist since childhood, according to MIT.

The accomplished scientist joined the MIT faculty in 2016 and “quickly became known as an imaginative scholar, gifted administrator and enthusiastic mentor,” MIT President Sally Kornbluth said in a statement.

“In the face of this shocking loss, our hearts go out to his wife and their family and to his many devoted students, friends and colleagues,” she said.

“This shocking loss for our community comes in a period of disturbing violence in many other places. It’s entirely natural to feel the need for comfort and support,” Kornbluth continued. “… In time, the many communities Nuno belonged to will create opportunities to mourn his loss and celebrate his life.”

U.S. Ambassador to Portugal John J. Arrigo said in a statement, “I extend my deepest condolences to the family, friends, and colleagues of Nuno Loureiro, who led MIT’s Plasma Science and Fusion Center. We honor his life, his leadership in science, and his enduring contributions.”

Copyright © 2025, ABC Audio. All rights reserved.

(NEW YORK) — New security video released on Monday by the Rhode Island police showed a person of interest wanted for questioning in the deadly mass shooting that erupted over the weekend on the campus of Brown University.

The video was taken shortly after Saturday’s shooting and shows a figure dressed in black walking along Waterman Street, which appears to be about three blocks north of the Brown campus, according to the Providence Police Department.

“We are sharing a video of a person of interest and plan to release additional video as part of the ongoing investigation,” the police department said in a statement, asking anyone who recognizes the individual in the video to contact investigators immediately.

The new video was made public after authorities announced that a person of interest detained early Sunday morning for questioning had been released.

In an interview on ABC News’ “GMA3” on Monday, Rhode Island State Attorney General Peter Neronha said the person initially detained in connection with the mass shooting has been “effectively cleared.”

“The evidence that we have, the scientific evidence that we have available to us, after it was analyzed, made clear that this was not someone who should be detained in connection with this case,” Rhode Island Attorney General Peter Neronha said on ABC News’ “GMA3.” “So we released him and then moved on, looking at other evidence and pursuing other leads pointing at additional potential individuals.”

Investigators are now bringing additional teams to canvass for video, analyze images, and sweep the crime scene for fingerprints as they work to build a more detailed timeline and, potentially, identify a suspect.

ABC News observed members of the FBI evidence response unit using a K-9 on Monday to canvas the area around the crime scene at Brown University. FBI agents were also viewed on campus searching bushes and raking the snow-covered ground for evidence.

“We understand that there’s a high degree of anxiety and after this individual was released last night, I understand that anxiety level has risen in our community,” Providence Mayor Brett Smiley told ABC News on Monday. “But it’s no different than a day ago, which is that we’ve received — continue to receive zero credible threats to our community, Brown or the broader community.”

Smiley’s comments came as federal and local law enforcement officials were continuing their investigation early on Monday, two days after the mass shooting in an academic building in Providence on Saturday.

A person of interest in the case, who had been taken into custody early on Sunday, was released later in the day, after authorities said that there was no basis to continue detaining them.

“Tonight, we announced that the person of interest is being released. The investigation has been ongoing and remains fully active between all agencies,” the Providence Police Department said in a statement early on Monday. “Since the first call to 911, we have not received any specific threats to our community.”

Smiley wouldn’t on Monday definitely say whether the person of interest who was released was cleared of all connection to the case. He also declined to say whether the investigation was pointing toward a student or someone from off-campus.

“We cannot comment on that and we’re exploring all possible leads,” he said.

Two people were killed and nine were injured in the shooting, according to officials. The injured victims were transported to local hospitals amid a day of “devastating gun violence,” Christina H. Paxson, the university’s president, said in a statement posted early on Sunday.

“Every year, emergency responders and students drill for the unthinkable — a shooting at our schools,” Gov. Dan McKee said in his own statement. “Yesterday, that action became all too real when a gunman opened fire on a classroom of innocent Brown University students.”

The FBI and other law enforcement officials shared a short video clip of someone whom they described as a person of interest. The individual in the clip is seen dressed in dark clothing, including what appeared to be a hood, as they walk along Hope Street and take a corner heading north.

The person’s right hand appeared to be in their jacket pocket as they walked northward along Waterman Street before exiting from the frame.

Officials said they still believe the person seen in that video is a person of interest in the shooting.

The person of interest who was detained and released on Sunday was initially caught at about 3:45 a.m. at a hotel in Coventry, about 28 miles south of Providence, according to law enforcement sources and Coventry police.

Law enforcement sources described the detained person of interest as a man in his mid-20s from Wisconsin. At the time the person was detained, the individual was allegedly in possession of two guns, according to sources.

There was “no basis” to keep the person detained, Attorney General of Rhode Island Peter Neronha said.

“Sometimes you head in one direction and have to regroup and go in another,” Neronha said. “That’s exactly what’s happened over the last 24 hours or so.”

Police said anyone with information about the case can contact investigators through an online Tip Center at www.fbi.gov/brownuniversityshooting or by calling (401) 272-3121.

ABC News’ Sasha Pezenik, Luke Barr and Pierre Thomas contributed to this report.

Copyright © 2025, ABC Audio. All rights reserved.