I say this because it is worth a mention that the inmates or clientel of Special Hospitals is not quite what you might expect.This is the case also for the prison populations.There is an alarming amount of very intelligent people amongst them.Middle class is the norm rather than the lower class populations.
For instance in my time there ,(Broadmoor),I made good acquaintances with a Mensa mathematician from Oxford University.Another Mensa with a phd in Gaelic language, from Cambridge university. I spent a lot of time with a guy who scored regularly in excess of 185 in his IQ tests.Another also used to score in the high 180, s , but sometimes showed abnormally low scores as well such as 60.
I met engineers , doctors ,even Psychiatrists.At the Bethlam there is a locked ward full of them.A unit that cater,s for psychiatrists with so called Schizophrenia.
An England schoolboy international footballer.There are a large amount of domestic cases, and family problem cases.
Another two guys that I liked who were friends and spent a lot of time playing chess were also both Mensa.
It is also true to a certain extent for some of the nursing staff, some of whom were Oxbridge. and the like who could really get much work after leaving University.
It is common for these highly intelligent ones to end up in prison or Mind hospital.
I have mentioned but a few examples.