Most of the people suffering with mental illnesses do not commit any crimes but there occur some cases where the criminals have certain mental conditions that are a reason behind the crimes they commit.
Most common mental conditions are
1) Schizophrenia
2) Borderline Personality Disorder
3) Antisocial Personality Disorder
Here are some cases of the criminals who have been diagnosed with serious mental illnesses.
But this doesn't mean that behind every crime there is a mental condition. This should be deeply assessed by a competent forensic psychologist.
The hardest factors about mental disorders and criminology is to what extent the individual bears culpability for their actions.
Thanks for posting these informative findings.
Treating effectively the underlying conditions might reduce recidivism. It's through understanding these complex issues that we may assist those who may be most at risk for comitting crime and thus focus on prevention as well as conviction.