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Manslaughter is the act of killing another human being in a way that is less culpable than murder. See Homicide.

Under both the common law and the Pennsylvania Method of differentiating degrees of murder, manslaughter was divided into voluntary and involuntary manslaughter:

  • Voluntary manslaughter is intentionally killing another person in the heat of passion and in response to adequate provocation.
  • Involuntary manslaughter is negligently causing the death of another person.

Under the Model Penal Code, manslaughter includes:

  • Reckless homicide
  • Homicide that would be murder, but "is committed under the influence of extreme mental or emotional disturbance for which there is reasonable explanation or excuse."

See Model Penal Code § 210.3