The Joliet Treatment Center is a prison in Illinois with a mission to provide mental healthcare to people with serious needs. An investigation by The Marshall Project, WBEZ and the Chicago Sun-Times counted more than 70 fires at the Joliet Treatment Center in the last three years. Here are three quick takeaways from our reporting on the fires and the response by the prison and the Illinois Department of Corrections. Men set fires because they were desperate for help. The Illinois Department of Corrections declined to answer questions about the fires at the Joliet Treatment Center, citing pending litigation.