what does diminished responsibility state in CAJA 2009?
a person who kills or is a party to the killing of another is not to be convicted if he or she was suffering from an abnormality or mental functioning which:
a arose from a recognised medical condition
b substantially impaired ds ability to
understand his nature of his conduct or
form a rational judgement or
c provides an explanation for the d is on the d, but the d need only prove it on the balance of probabilities