Colorado Code
Part 2 - Authority of Person Not a Peace Officer to Make an Arrest
§ 16-3-201. Arrest by a Private Person

A person who is not a peace officer may arrest another person when any crime has been or is being committed by the arrested person in the presence of the person making the arrest.
Source: L. 72: R&RE, p. 199, § 1. C.R.S. 1963: § 39-3-201.