mens rea

Mens rea (; Latin for "guilty mind") in criminal law, is viewed as one of the necessary elements of some crimes. The standard common law test of criminal liability is usually expressed in the Latin phrase, actus reus non facit reum nisi mens sit rea, which means "the act is not culpable unless the mind is guilty". Thus, in jurisdictions with due process, there must be an actus reus, or "guilty act", accompanied by some level of mens rea to constitute the crime with which the defendant is charged (see the technical requirement of concurrence). As a general rule, criminal liability does not attach to a person who merely acted with the absence of mental fault. The exception is strict liability crimes.