An anonymous reader quotes a report from WRGB: The discovery of two working computers hidden in a ceiling at the Marion Correctional Institution prompted an investigation by the state into how inmates got access. In late July, 2015 staff at the prison discovered the computers hidden on a plywood board in the ceiling above a training room closet. The computers were also connected to the Ohio Department of Rehabilitation and Correction's network. Authorities say they were first tipped off to a possible problem in July, when their computer network support team got an alert that a computer "exceeded a daily internet usage threshold." When they checked the login being used, they discovered an employee's credentials were being used on days he wasn't scheduled to work. That's when they tracked down where the connection was coming from and alerted Marion Correctional Institution of a possible problem. Investigators say there was lax supervision at the prison, which gave inmates the ability to build computers from parts, get them through security checks, and hide them in the ceiling. The inmates were also able to run cabling, connecting the computers to the prison's network. Furthermore, "investigators found an inmate used the computers to steal the identify of another inmate, and then submit credit card applications, and commit tax fraud," reports WRGB. "They also found inmates used the computers to create security clearance passes that gave them access to restricted areas."