Most of the state's 15 public universities have amassed surveillance systems in recent years that include hundreds of cameras across campus. They're inside sporting facilities, classroom buildings and common areas of dorms. Several universities, including CMU, Eastern Michigan University and Saginaw Valley State University, report they are installing more cameras this year. Officials say the cameras help combat crime - and police can cite cases in which footage helped an investigation and led to an arrest and conviction. Campus officials say the cameras are used to keep students safe, not to spy on them. At Eastern and Western Michigan, there are 700 and 900, respectively. At Northern Michigan, 400 cameras record students and others. And at Wayne State, more than 1,000 cameras are stationed around campus.

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