The basic rationale for a college or university to outsource to a vendor could be summed up this way: I can't do this, others can, I think I'll let them.
Never doubt the importance of good surveillance technology. Take, for example, the case of a missing former University of Wisconsin-Madison student, which occurred last spring. Police searched for Audrey Seiler and after finding her in a marsh, went on the hunt for a "bad man" Seiler accused of abducting her from her campus apartment and holding her captive. Several hundred volunteers joined the effort and a national media blitz followed.