Previously: Cook County Schools, Cook County Jails. B0124. Until last year, Illinois operated a $20-million-a-year super maximum security prison (“Supermax”) in the remote southern city of Tamms. There were only two hundred inmates, making it one of the most expensive prisons per capita of any in the country. It was also among the few prisons to practice complete, utter social isolation. Inmates were kept in miniscule chambers with thick metal doors and plexiglass windows…