Colo. Rev. Stat. § 28-4-109
Any military forces or organizations, units, or detachments thereof of another state who are in fresh pursuit of insurrectionists, saboteurs, terrorists, enemies, or enemy forces may continue such pursuit into this state until the military or police forces of this state or the forces of the United States have had a reasonable opportunity to take up the pursuit or to apprehend or capture such persons within this state while in fresh pursuit. Any such person who is captured or arrested by the military forces of such other state while in this state, without unnecessary delay, shall be surrendered to the military or police forces of this state to be dealt with according to law. This section shall not be construed so as to make unlawful any arrest in this state which would otherwise be lawful, and nothing contained in this section shall be deemed to repeal any of the provisions of sections 16-3-104 and 16-3-106, C.R.S.
C.R.S. § 28-4-109