What is the "necessity" defense?

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Occasionally, a person faces a situation that requires doing something illegal in order to prevent serious harm. In such a situation, the defense of necessity, which is also called the lesser-of-two-evils defense, comes into play.

A defendant who raises the necessity defense admits to committing what would normally be a criminal act, but claims the circumstances justified it.

Normally, to establish a necessity defense—a tall order—a defendant must prove that:

  • there was a specific threat of significant, imminent danger
  • there was an immediate necessity to act
  • there was no practical alternative to the act
  • the defendant didn’t cause or contribute to the threat
  • he or she acted out of necessity at all times, and
  • the harm caused wasn’t greater than the harm prevented.

Traditionally, the necessity defense isn’t available to a defendant who kills an innocent person, regardless of the circumstances.

Example: A defendant was convicted of driving with a suspended license for travelling to a telephone to call for help for his pregnant wife. He didn’t have his own phone, and his wife was experiencing back and stomach pains. He first walked to his only neighbor’s house to use the phone, but found no one home. He then drove a mile and a half to the nearest phone to call his mother-in-law for help. On the drive back home, the police stopped him for a broken tail light and arrested him for driving with a suspended license. Recognizing that circumstances beyond one’s control sometimes force a defendant to engage in illegal conduct, the appellate court ruled that the trial court should have allowed the defendant to present a necessity defense. (State v. Cole, 403 S.E.2d 117 (S.C. 1991).)

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