An accessory is a person who assists in the commission of a
crime, but does not actually participate in the commission of the crime as a joint principal. The distinction between an accessory and a
principal is a question of fact and degree:The principal is the one whose acts or
omissions, accompanied by the relevant
mens rea, are the most immediate cause of the
actus reus (
Latin for "guilty act").If two or more people are directly responsible for the actus reus, they can be charged as joint principals (see
common purpose). The test to distinguish a joint principal from an accessory is whether the defendant independently contributed to causing the actus reus rather than merely giving generalised and/or limited help and encouragement.
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