For those living with severe mental illness, the chances of becoming homeless can be high. Once homeless, they’re more likely to end up behind bars. Going to jail can start a downward spiral. Many lose jobs or benefits — even health care. Some will cycle between jail and the streets for years — often for minor crimes like trespassing. Last week, WFAE — with support from the PBS series, "FRONTLINE" — examined the problem of inmates who wait in custody for months because they’re too sick to stand trial. This week we focus on inmates who cycle in and out of jail, serving what many in the court system call a “life sentence on the installment plan.”