Diminished responsibility or drug laden excuses for crime.
If violence occurs there should be no excuses which cause a lesser sentence for an offence. By all means explain why the behaviour occurred and then slap the biggest sentencing possible.
Crime should never be excused. It makes a mockery of an already weak system. When physical harm is done then a punishment equal to the deed should be handed down.
The system should not be kind to criminals who have shown no kindness in their deed. And by all means they can be sorry, but they still must pay for their bad behaviour.
Excuses should not lesson the punishment. A victim must feel satisfied their ordeal was acknowledged.