Dangerous and severe personality disorder

Dangerous and Severe Personality Disorder (DSPD) is a former categorization of personality disorder which manifests in a manner which poses a significant risk of serious crime and harm to others. It is not, and has never been, a clinical diagnosis; rather it was used in policy for categorizing dangerous individuals who should not be released, but were at the same time not treatable under the Mental Health Act 1983.

Source: Wikipedia — Dangerous and severe personality disorder (CC BY-SA 4.0)