According to a recent U.S. Department of Justice study, more than half of all state prisoners in America reported some kind of mental health problem last year. At least one in every five inmates in Colorado's prison system is seriously mentally ill -- and, as this week's cover story, "Head Games," makes clear, that figure might be a lowball estimate. On Friday, Sept. 22, Alan Prendergast will talk about how the state deals with (and often ignores) mentally ill prisoners in an interview with Ryan Warner on Colorado Public Radio's Colorado Matters, 10:00 a.m., KCFR, 1340 AM, with a second airing at 7 p.m.