Here is a study from the website of Prison Reform Trust, in UK.
N O O N E K N O W S
Identifying and supporting prisoners with learning difficulties and learning disabilities: the views of prison staff
by Nancy Loucks
with Talbot Jenny
Prisons receive, often with no prior notice, many people with complex and multi-layered needs. People with learning disabilities and difficulties are a substantial part of this population. Five years ago, a study by Fiona Myers in Scotland found few people who had been formally diagnosed. Since then, prisons have found better means and routes to surfacing problems and, if that work were to be repeated now, I am confident that it would find many more.
What lies behind this present study are the efforts of many individuals who, in the course of their work, have carried out acts of professionalism and kindness by adjusting and responding to prisoners in order to lessen the shock and strangeness of new circumstances when they are particularly vulnerable. There are several examples also of sustained leadership, and work in groups to support vulnerable people in prisons and in preparation for release.
This study contains much more. We in the prison service accept the challenge that the report sets out to identify, and its publication is welcome. The Scottish Prison Service will continue to train its staff to be aware of people with disabilities in order to be able to respond with greater confidence to their needs. It will continue to invest in staff and services with specialist skills, to encourage education and health specialists to come into come into prison in order to support care, and we will encourage appropriate flows of personal information to support care. Read all document.