insanity Flashcards
what is insanity
a mental capacity defence
what are the rules of insanity based on
MNaghten Rules 1843 which sets out 3 elements that need to be satisfied
who is the burden of proving insanity
is on the defence who must prove it on the balance of probabilities
1st
D must have a defect of reason which means deprived of the powers of reasoning and is more than absent mindedness or confusion Clarke it can be permanent or temporary as in Sullivan
2nd
the defect of reason must be due to a disease of the mind. This is a legal test not a medical one and can be internal mental disease or physical disease which affects the mind. Examples are being paranoid delusional/paranoid MNaghten, hardening of the arteries Kemp epilepsy Sulliavn diabetes Hennessy and sleepwalking sleep disorder Burgess
being diabetic but not eating properly
is an external cause and is automatism not insanity as in Quick. The presence of intoxication through alcohol or drugs is an external factor and is not a disease of the mind
3rd
D must not know the nature and quality of their act which means he does understand or know what he is doing