13-103. Abolition of common law offenses and affirmative defenses; definition
A. All common law offenses and affirmative defenses are abolished. No conduct or omission constitutes an offense or an affirmative defense unless it is an offense or an affirmative defense under this title or under another statute or ordinance.
B. For the purposes of this section, "affirmative defense" means a defense that is offered and that attempts to excuse the criminal actions of the accused or another person for whose actions the accused may be deemed to be accountable. Affirmative defense does not include any justification defense pursuant to chapter 4 of this title or any defense that either denies an element of the offense charged or denies responsibility, including alibi, misidentification or lack of intent.