The issue of responsibility under sections 18-1-801 to 18-1-804 is an affirmative defense.
Source: L. 71: R&RE, p. 412, § 1. C.R.S. 1963: § 40-1-905.
Responsibility - affirmative defense
Colo. Rev. Stat. § 18-1-805, under RESPONSIBILITY.
Colo. Rev. Stat. § 18-1-805