What is Actus Non Facit Reum Nisi Mens Sit Rea?

Actus non facit reum nisi mens sit rea is a basic criminal law principle, meaning an act does not make a person guilty unless the mind (intent) is also guilty.

Simply doing something wrong is not enough for criminal liability; the person must also have a guilty mind (mens rea) alongside the wrongful act (actus reus).

This ensures fairness in criminal law by requiring both the act and criminal intent for most offences.