"If it's a non-campus community member, the threat detection process really wouldn't work," he said. "It also doesn't work when you have a single incident that escalates immediately."
Short of installing a fence ringed with metal detectors around a campus, there are few ways to prevent such crimes, said Carter, who heads a group that analyzes campus safety.
"We have traditionally decided that as a society, we want campuses to be open places," said Carter.
Jonathan Bernstein, who owns Los Angeles-based Bernstien Crisis Management Inc., said in the aftermath of the shootings Morgan officials need to continually reassure students and the public that they have safety measures in place. They also need to take this time to make sure there is not more they can do to improve safety.
But he says all campuses are prone to violence and even the strongest safety measures won't always prevent crime. Universities should constantly revaluate ways to beef up efforts, he said.
"No matter how many systems put in place, somebody can always find a way to get around the system," Bernstein said. "Crisis prevention is not a static process. It should be a living dynamic process."
Some students said a fence around campus might not be such a bad idea.
"I do think Morgan should be a gated community," said Cameron Gilbert, a senior TV production major from Bowie. "Every day, there are people on this campus who don't go to school here."
Gilbert, 21, said his mother has been concerned about his safety, particularly when he has evening classes. Rather than walk the few blocks between his apartment and campus, he now drives at night.
He said he thought campus police were overly focused on busting underage drinking and loud parties, and did not do enough to prevent violent crime.
Carter said one way to cut down on violent crime would be to teach students to de-escalate conflict. Since both shooting victims had ties to the football team, Carter recommended the players to be among the first to receive such training.
At least one prospective student said news of two shootings in one semester was making her rethink her dream of attending Morgan.
"I don't really want to go to a school where I'm not safe and I'm not secure," said Yetunde Alawiye, 17, a junior at Kenwood High in Essex. "There's too much going on at Morgan. They need to bring it down a little bit."
Baltimore Sun reporters Brian Waters and Jeremy Bauer-Wolf contributed to this article.