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1L Criminal Law: Elements and Defenses

Actus reus, mens rea, homicide grades, inchoate crimes, accomplice liability, and defenses.

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45 basic cards for Law School Law. It opens with "What is actus reus?" and "Can mere thoughts or mental states alone constitute actus reus?". More Professional Certifications decks are listed below.

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What is actus reus?
Show answerThe guilty act element of a crime, requiring a physical or overt action
Can mere thoughts or mental states alone constitute actus reus?
Show answerNo, there must be a physical or overt act
What is the voluntary act requirement in criminal law?
Show answerThe defendant must have engaged in a volitional movement, not involuntary conduct
When can failure to act create criminal liability?
Show answerWhen there is a legal duty to act and the defendant breaches it
Give three examples of legal duties that impose liability for omission.
Show answerParent-child duty, contractual duties, duty of care as a property owner
What is a status crime and why is it constitutionally problematic?
Show answerA crime defined solely by status, such as vagrancy; it punishes condition rather than conduct
How does the Model Penal Code define a voluntary act?
Show answerA conscious exercise of dominion over one's body or muscles resulting in external movement
Is sleepwalking a defense to a charge requiring actus reus?
Show answerYes, because the defendant lacks consciousness and voluntary control
What is the difference between reflex actions and voluntary acts?
Show answerReflex actions are involuntary responses; voluntary acts require conscious control
Can a status acquired through prior conduct be punished as a crime?
Show answerGenerally no, though some courts allow punishment if the conduct itself is recent
What are the four levels of mens rea from most to least culpable?
Show answerPurpose (intent), Knowledge, Recklessness, Negligence
Define purpose or intent in criminal law.
Show answerThe defendant acts with the goal or objective of causing the result or engaging in conduct
What is the difference between knowledge and purpose?
Show answerKnowledge means awareness of a high probability; purpose means the defendant's objective or goal
Define recklessness in criminal law.
Show answerThe defendant consciously disregards a substantial and unjustifiable risk of harm
How does criminal negligence differ from civil negligence?
Show answerCriminal negligence requires gross or extreme departure from reasonable care; civil negligence is ordinary unreasonable conduct

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