Police departments across the country are finding themselves supplemented, and in some cases supplanted, by private security firms. Simon Hakim, professor of economics and director of Temple's Center for Competitive Government, says in the early '70s, there were seven police officers for every four private security guards. Today, it's one officer for every three private guards. "Now, the demand for security has grown, even by municipalities. And municipalities start to feel the budget crunch," Hakim said. "So the result of it is that a lot of security that governments require, governments started to contract it out to private agencies."