Defenses Flashcards
Duress — affirmative defense and excuses D’s conduct if it was the result of:
1) a threat of imminent death or serious bodily injury
2) to the D or another, AND
3) D reasonably believed he was unable to avoid the harm by non-criminal conduct
In most states, duress defense is NOT available for:
Intentional killings
Insanity
D must have a mental disease or defect plus one of the tests
— M’Naghten
— MPC
— Irresistible impulse
— Durham test
**most states use MNaghten or MPC
M’Naghten Test
D is:
a) unable to know the wrongfulness of his conduct, or
b) unable to understand the nature and quality of his acts
MPC test (insanity)
D was:
a) unable to appreciate the criminality of his conduct, or
b) unable to conform his actions to the law.
Irresistible impulse test
D’s mental illness made him:
a) unable to control his actions, or
b) unable to conform his actions to the law
Durham test
D’s unlawful conduct was the product of mental illness
Self-defense
Complete defense to a crime
Self defense — non deadly force justified when:
(1) D reasonably believes
(2) that he’s in imminent danger of being harmed
Self defense — deadly force justified when:
(1) D kills based on a reasonable belief
(2) that he was in imminent danger of being killed (or suffering great bodily injury), AND
(3) the use of deadly force was necessary
Self defense — duty to retreat (minority of states)
D has a duty to retreat before deadly force may be used
BUT, D has no duty to retreat when:
(a) no opportunity to retreat
(b) he could not retreat safely; or
(c) if attacked in his own home
Self defense — an aggressor may only use force in self defense if:
(a) he withdraws and communicates it; OR
(b) the other person escalates the fight with deadly force and withdrawal is not possible
Defense of others
Same rules as self defense
Imperfect self defense
Mitigates murder to voluntary manslaughter when:
(1) D kills based on a good faith belief of self-defense
(2) but such belief was unreasonable
Voluntary intoxication defense
Ingesting an intoxicating substance by D’s own free will
− ONLY a defense to specific intent crimes