Search on for Brown University shooter

Person of interest is released as questions about investigation, campus security swirl.

- By KIMBERLEE KRUESI AND LEAH WILLINGHAM

FBI AGENTS search for evidence Monday near the campus in Providence, R.I.

(ROBERT F. BUKATY Associated Press)

Authorities knocked on doors Monday searching for any video there might be of the Brown University gunman, who could be seen in grainy footage walking away from the weekend attack that killed two students and wounded nine others.

Police renewed their search after releasing a person of interest Sunday once they determined the evidence pointed elsewhere. Meanwhile, details began to emerge about the students who were killed.

The abrupt change of direction marked a setback in the investigation of Saturday’s attack at the Ivy League school. Questions were mounting about campus security, the apparent lack of video evidence and whether the focus on the person of interest gave the killer more time to escape.

Providence residents and students were relieved when officials said they had detained a man at a Rhode Island hotel early Sunday in connection with the attack and lifted the lockdown. But that relief was short-lived when Mayor Brett Smiley said hours later that investigators didn’t know if the gunman still was in the area.

Colin Moussette, who has friends at Brown and is considering enrolling next fall, said while visiting the campus Monday that he felt uneasy knowing the suspect hadn't been caught.

“How someone got away, like in the middle of the day is, to me, not only heartbreaking but very concerning,” he said. “How they got access to the building is concerning.”