Text. Any person punishable under this chapter who
(1) commits an offense punishable by this chapter, or aids, abets, counsels, commands, or procures its commission; or
(2) causes an act to be done which if directly performed by him would be punishable by this chapter; is a principal.
(1) Purpose. Article 77 does not define an offense. Its purpose is to make clear that a person need not personally perform the acts necessary to constitute an offense to be guilty of it. A person who aids, abets, counsels, commands, or procures the commission of an offense, or who causes an act to be done which, if done by that person directly, would be an offense is equally guilty of the offense as one who commits it directly, and may be punished to the same extent.
Article 77 eliminates the common law distinctions between principal in the first degree (perpetrator), principal in the second degree (one who aids, counsels, commands, or encourages the commission of an offense and who is present at the scene of the crimecommonly known as an aider and abettor), and accessory before the fact (one who aids, counsels, commands, or encourages the commission of an offense and who is not present at the scene of the crime). All of these are now principals.
(2) Who may be liable for an offense.
(a) Perpetrator. A perpetrator is one who actually commits the offense, either by the perpetrators own hand, or by causing an offense to be committed by knowingly or intentionally inducing or setting in motion acts by an animate or inanimate agency or instrumentality which result in the commission of an offense. For example, a person who knowingly conceals contraband drugs in an automobile, and then induces another person, who is unaware and has no reason to know of the presence of drugs, to drive the automobile onto a military installation, is, although not present in the automobile, guilty of wrongful introduction of drugs onto a military installation. (On these facts, the driver would be guilty of no crime.) Similarly, if, upon orders of a superior, a soldier shot a person who appeared to the soldier to be an enemy, but was known to the superior as a friend, the superior would be guilty of murder (but the soldier would be guilty of no offense).
(b) Other Parties. If one is not a perpetrator, to be guilty of an offense committed by the perpetrator, the person must:
(i) Assist, encourage, advise, instigate, counsel, command, or procure another to commit, or assist, encourage, advise, counsel, or command another in the commission of the offense; and
(ii) Share in the criminal purpose of design.
One who, without knowledge of the criminal venture or plan, unwittingly encourages or renders assistance to another in the commission of an offense is not guilty of a crime. See the parentheticals in the examples in paragraph 1b(2)(a) above. In some circumstances, inaction may make one liable as a party, where there is a duty to act. If a person (for example, a security guard) has a duty to interfere in the commission of an offense, but does not interfere, that person is a party to the crime if such a noninterference is intended to and does operate as an aid or encouragement to the actual perpetrator.
(a) Not necessary. Presence at the scene of the crime is not necessary to make one a party to the crime and liable as a principal. For example, one who, knowing that person intends to shoot another person and intending that such an assault be carried out, provides the person with a pistol, is guilty of assault when the offense is committed, even though not present at the scene.