Like previous images, the enhanced photo released by the FBI showed a man with a black face mask, a beanie and what appears to be a two-toned jacket.

Rhode Island officials released a new image Tuesday of a person of interest in the search for the shooter who killed two Brown University students and injured nine others on Saturday.

Like previously released images, the new enhanced photo shows a man with a black face mask, a beanie and what appears to be a two-toned jacket. The shoulders and sleeves appear to be either black or blue while the torso area of the jacket is brown.

Rhode Island Attorney General Peter Neronha told MS Now prior to the photo`s release on Tuesday that officials have been able to use cameras from homes and businesses in the area to establish a "good picture" of the suspected gunman`s route.

The FBI, along with Providence and Rhode Island police, also released a video timeline that showed the movements of the person of interest on the day of the shooting.

The timeline appeared to be comprised of footage from home security cameras and show a person walking down brick-lined pathways of a suburban area. Law enforcement had been canvassing the area near where the shooting took place, knocking on doors, and have asked the public to reach out with any video footage or tips.

Neronha noted that while there are hundreds of cameras around Brown`s campus, the gunman entered a portion of the engineering building that had been built in the 1940s or 1950s.

Providence police released a new image of the person of interest in the Brown University shooting.Providence Police

"There just aren`t a lot of cameras - really very few cameras, if at all - in that part of the building," Neronha said. "So there may be 800 cameras on the Brown campus, but they`re not located on the edge of the campus, which is where this building is. And unfortunately in the older part of the building, they`re just not there."

Jensine Coggin, a Ph.D. student at Brown, was working with an undergraduate student in a lab at the Engineering Research Center at the time of the shooting. She told NBC News that the research center is connected to the Barus and Holley building where the shooting took place.

It`s a hot spot for students who are trying to study and it sees a lot of foot traffic, Coggin said, adding that many of the students who hunker down there often let their friends in.

She noted that she didn`t scan in that day either because when she walked in, a door was propped open.

"They prop doors open, people let people in," Coggin said. "It could have been anybody, honestly. I mean, Brown, it`s in the middle of the city ... people are always around."

Authorities have yet to identify a suspect despite days of searching. A person of interest was initially detained early Sunday morning but was released by the end of the day after officials said evidence pointed in a different direction.

Brown University administrators assured the campus community that they were safe though the suspect remains at large. A letter from Brown University Department of Public Safety noted that Providence police are maintaining a perimeter around campus, which has been closed to the public.

"We have doubled staffing by Brown Department of Public Safety personnel, and we have a significant number of law enforcement and security personnel from multiple other agencies on campus," the letter said.

Many students have left campus for the rest of the year after the university cancelled final exams and classes for the remainder of the semester.