Webthe crd found that the jail’s mental health program failed to provide constitutionally adequate mental health treatment. It had inadequate psychotherapy,. Clinical studies suggest that 6 to 15 percent of persons in city and county jails and 10 to 15 percent of persons in state prisons have. Webalmost a third of l. a. County jail’s population suffers from mental illness, including nearly all of the inmates at twin towers, which is larger than santa rita.