Search for the Brown University shooter continues as questions swirl about campus security

Authorities knocked on doors in search of video and sifted through snow and dumpsters for other evidence that might lead them to the Brown University gunman, whose face was covered or not visible in footage captured before and after the weekend attack that killed two students and wounded nine others. “We’re asking for the public’s assistance,” Providence's police chief, Col. Oscar Perez, said at a news conference, urging people who might recognize the suspect to call a tip line. Police renewed their search after releasing a person of interest Sunday once they determined the evidence pointed elsewhere.