The shooting death of nine students at a community college in Oregon Thursday has prompted local colleges to re-evaluate their own security policies.

News 12 toured the 90-acre campus of Mercy College Friday with Security Chief Caesar Robles, who said the staff takes "great pride" in constantly reviewing emergency procedures. He says security on the campus is present 24 hours a day.

The Dobbs Ferry college has more than 150 cameras, security officers on foot and in cars, and emergency call boxes across the campus.

Still, Chief Safety Officer Anne Gilmartin says it's impossible to prevent every dangerous scenario that could occur.

"If you have someone insane and willing to trade their life for a cause they believe in and no one knows what it is, it difficult to protect against it," says Gilmartin.

She insists that her security team is vigilant and safeguards in place appear to be working.