(a) He solicits, accepts or agrees to accept any benefit upon an agreement or understanding that he will refrain from initiating a prosecution for a crime; or

(b) He confers, or offers or agrees to confer, any benefit upon another person upon an agreement or understanding that such other person will refrain from initiating a prosecution for a crime. 2. In any prosecution under this section, it is an affirmative defense that the benefit did not exceed an amount which the defendant reasonably believed to be due as restitution or indemnification for harm caused by the crime. Compounding a crime is a class A misdemeanor.