It is an affirmative defense to a charge of conspiracy that the offender, after conspiring to commit a crime, thwarted the success of the conspiracy, under circumstances manifesting a complete and voluntary renunciation of his criminal intent.
C.R.S. § 18-2-203
For affirmative defenses generally, see §§ 18-1-407 , 18-1-710 , and 18-1-805 .