Mentally Disordered Offender (MDO)
Definition
An individual who has committed an offence and who has a diagnosable mental disorder that is aetiologically or functionally linked to that offending. MDOs may be diverted from prison to hospital at various points in the criminal justice process.
- Abbreviation
- MDO
- Definition basis
- Offence linked to diagnosable mental disorder
- Possible outcome
- Diversion from prison to hospital
Common questions
What does 'aetiologically or functionally linked' mean in the MDO definition?+
It means the mental disorder either caused the offending behaviour or is functionally connected to it, such as symptoms directly driving the criminal act. A person with a mental disorder who offends for unrelated reasons would not necessarily meet this definition.
At what stages of the criminal justice process can diversion of an MDO occur?+
Diversion can happen at multiple points, including at arrest, during court proceedings before sentencing, or after sentencing while in custody, depending on when the mental disorder and its link to offending is identified and assessed.
Related terms
- Community Treatment Order (CTO)
- A legal order under the Mental Health Act 1983 (England and Wales) requiring a patient discharged from hospital to adhere to specified...
- Dangerous Severe Personality Disorder (DSPD)
- A UK policy category (not a diagnostic term) for individuals assessed as presenting grave and immediate danger due to personality disorder. DSPD...
- Dialectical Behaviour Therapy (DBT)
- Marsha Linehan's structured treatment for borderline personality disorder, combining acceptance and change strategies across four skill modules (mindfulness, distress tolerance, emotion regulation,...
- Moral Reconation Therapy (MRT)
- Greg Little and Kenneth Robinson's manualized group programme targeting moral reasoning development through structured workbook exercises. Widely used in US corrections; evidence...
- Multi-Systemic Therapy (MST)
- Scott Henggeler's community-based intensive family therapy for serious juvenile offenders, targeting all ecological levels (family, peers, school, neighbourhood) simultaneously. Has strong RCT...
- NIMHANS
- National Institute of Mental Health and Neurosciences, Bangalore; India's principal academic forensic mental health centre, providing court-ordered assessments and limited forensic treatment...
- Schema-Focused Therapy (SFT)
- Jeffrey Young's CBT extension for personality disorder, addressing early maladaptive schemas through a combination of cognitive restructuring, experiential techniques, and the therapeutic...