USC began a new nighttime security plan with extra guards and security cameras that was put into place after a shooting on Halloween wounded four people on campus.
The school deployed extra security guards -- visible in their yellow jackets -- and put in place a plan that includes limiting access to the campus at night.
Between 9 p.m. and 6 a.m., officials are allowing eight of the 27 entrances to remain open. Only students and staff with university-issued ID are being allowed on campus during those hours, officials said.
Students have to present their IDs at all on-campus dorms 24 hours a day and have to register guests on a university system that requires an ID and a fingerprint scan.
Student Fabiola Wells welcomes the changes.
"It makes me feel safe,” she said. “I feel there's people out there watching the gates … All we have to do is carry our student ID."
Four students were shot and wounded after an argument broke out on Oct. 31 at an on-campus party.
The party was held by a student group that used a third-party promoter to advertise the event throughout Los Angeles, even though the event was open only to students with student IDs, campus officials said.
As a result of the ad, officials said, the school had to bar many people who were not USC students from getting in to the party.
The shooting exacerbated anxiety among campus officials, students, parents and others, who were reeling from the April shooting deaths of two grad students in an off-campus robbery that triggered a wrongful death lawsuit against the university by the slain students' parents.