9 GCA § 4.60: Guilt Established by Complicity.

A person is guilty of an offense if, with the intention of promoting or assisting in the commission of the offense, he induces or aids another person to commit the offense. If the definition of the offense includes lesser offenses, the offense of which each person shall be guilty shall be determined according to his own culpable mental state and to those aggravating or mitigating factors which apply to him.