In any prosecution for an offense in which the criminal liability of the accused is based upon the conduct of another under section 13-303 or pursuant to section 13-1003, it is no defense that:

1. The other person has not been prosecuted for or convicted of such offense, or has been acquitted of such offense, or has been convicted of a different offense or degree of offense or has an immunity to prosecution or conviction for such offense; or

2. The accused belongs to a class of persons who by definition of the offense are legally incapable of committing the offense in an individual capacity.