Applicable to Denver city council, mayor...
Next I will post the city violation per Bureau of Justice
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8 U.S. Code § 1324 - Harboring
(a) Criminal penalties
(1)
(A) Any person who
(iii) knowing or in reckless disregard of the fact that an alien has come to, entered, or remains in the United States in violation of law, conceals, harbors, or shields from detection, or attempts to conceal, harbor, or shield from detection, such alien in any place, including any building or any means of transportation;
B) A person who violates subparagraph (A) shall, for each alien in respect to whom such a violation occurs—
(i) in the case of a violation of subparagraph (A)(i) or (v)(I) or in the case of a violation of subparagraph (A)(ii), (iii), or (iv) in which the offense was done for the purpose of commercial advantage or private financial gain, be fined under title 18, imprisoned not more than 10 years, or both-