Colorado Code
Part 5 - Perjury and Related Offenses
§ 18-8-507. Perjury and False Swearing - Previous Criminal Action

No prosecution may be brought under section 18-8-502, 18-8-503, or 18-8-504 if the substance of the defendant's false statement is the entry of a plea of not guilty in a previous criminal action in which he or she was accused of an offense.
Source: L. 71: R&RE, p. 464, § 1. C.R.S. 1963: § 40-8-507. L. 2000: Entire section amended, p. 28, § 1, effective July 1.