Criminal law: Scope of criminal liability - Complicity

Complicity is the participation in a completed criminal act of an accomplice, a partner in the crime who aids or encourages (abets) other perpetrators of that crime, and who shares with them an intent to act to complete the crime. A person is an accomplice of another person in the commission of a crime if they purpose the completion of a crime, and toward that end, if that person solicits or encourages the other person, or aids or attempts to aid in planning or committing the crime, or has legal duty to prevent that crime but fails to properly make an effort to prevent it.