Colo. Rev. Stat. § 31-4-112
The marshal or chief of police shall execute and return, by himself or herself or by any member of the police force, all writs and processes directed to him or her by the municipal judge in any case arising under a city ordinance. In criminal cases, quasi-criminal cases, or cases in violation of city ordinances, he or she may serve the same in any part of the county in which such city is situate. The marshal, chief of police, or any member of the police force shall suppress all riots, disturbances, and breaches of the peace, shall apprehend all disorderly persons in the city, and shall pursue and arrest any person fleeing from justice in any part of the state. He or she shall apprehend any person in the act of committing any offense against the laws of the state or ordinances of the city and, forthwith and without any warrant, bring such person before a municipal judge, county judge, or other competent authority for examination and trial pursuant to law. He or she has, in the discharge of his or her proper duties, powers and responsibilities similar to those that sheriffs have in like cases. The marshal or chief of police may employ certified peace officers to enforce all laws of the state of Colorado notwithstanding section 16-2.5-201.
C.R.S. § 31-4-112
(1) This section is similar to former § 31-3-105 as it existed prior to 1975.
(2) Section 4 of chapter 105 (SB 17-066), Session Laws of Colorado 2017, provides that the act changing this section applies before, on, and after April 4, 2017.