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DR
| Question | Answer |
|---|---|
| What is this defence and where is this found | Partial defence for murder and s.52 Coroners and Justice act 2009 |
| What’s the first part to the test | Abnormality of mental functioning: Ds mental functioning must be so different from that of a normal person that the reasonable man would term it abnormal (Byrne) |
| What is the second part to the test | Recognised medical condition: the D must have a RMC that is confirmed with medical evidence (English) |
| What is the third part to the test | Substantial impairment: the abnormality of the Ds mental functioning must substantially impair Ds ability to do one or more of the following: Understand the nature of his conduct Form a rational judgement (Martin) Exercise self control (Byrne) |
| What is the fourth part to the test | Provide an explanation: the impairment must be a significant contributory factor in causing the D to kill The defence will fail if evidence shows they would have killed anyway |
| What is the effect of the defence | Mandatory life sentence reduced to discretionary life sentence |