With access to two US jails, reporter Hilary Andersson finds that American prisons are having to accommodate vast numbers of inmates with serious mental health problems.

There is a crisis today in America's prison system which has little to do with crime. It contributes to the abuse and even the deaths of some prisoners at the hands of those paid to take care of them.

With access to two US jails, reporter Hilary Andersson finds America's prisons are now having to accommodate vast numbers of inmates with serious mental health problems. The programme reveals that more than a million mentally troubled Americans are imprisoned and may be chained to beds, sprayed with pepper spray and kept in isolation indefinitely.