(1) A person is guilty of an offense committed by another person when, with the intention of promoting or facilitating the commission of the offense, he:
(a) Solicits, commands, or engages in a conspiracy with such other person to commit the offense; or (b) Aids, counsels, or attempts to aid such person in planning or committing the offense; or (c) Having a legal duty to prevent the commission of the offense, fails to make a proper effort to do so.
(2) When causing a particular result is an element of an offense, a person who acts with the kind of culpability with respect to the result that is sufficient for the commission of the offense is guilty of that offense when he:
(a) Solicits or engages in a conspiracy with another person to engage in the conduct causing such result; or (b) Aids, counsels, or attempts to aid another person in planning, or engaging in the conduct causing such result; or (c) Having a legal duty to prevent the conduct causing the result, fails to make a proper effort to do so.