Mens Rea is a fundamental principle of Law and necessary element for establishing criminal liability whereby the intent of the accused to knowingly commit a crime must be established as well as evidence of the action of a crime.
The Phrase “Mens Rea” comes from Latin and means “guilty mind”. It is derived from the Latin phrase and maxim actus non facit reum nisi mens sit rea, meaning "the act does not make a person guilty unless the mind be also guilty".