Wisconsin Statutes Crimes (Ch. 938 to 951) § 939.05. Parties to crime

(a) Directly commits the crime; or

(b) Intentionally aids and abets the commission of it; or

(c) Is a party to a conspiracy with another to commit it or advises, hires, counsels or otherwise procures another to commit it. Such a party is also concerned in the commission of any other crime which is committed in pursuance of the intended crime and which under the circumstances is a natural and probable consequence of the intended crime. This paragraph does not apply to a person who voluntarily changes his or her mind and no longer desires that the crime be committed and notifies the other parties concerned of his or her withdrawal within a reasonable time before the commission of the crime so as to allow the others also to withdraw.