Section 140.17. Criminal trespass in the first degree

A  person  is  guilty of criminal trespass in the first degree when he
  knowingly enters or remains unlawfully in a building, and when,  in  the
  course of committing such crime, he:
    1.   Possesses,  or  knows  that  another  participant  in  the  crime
  possesses, an explosive or a deadly weapon; or
    2. Possesses a firearm, rifle or shotgun, as those terms  are  defined
  in  section  265.00,  and  also  possesses  or  has readily accessible a
  quantity of ammunition which is capable of being  discharged  from  such
  firearm, rifle or shotgun; or
    3.  Knows  that  another participant in the crime possesses a firearm,
  rifle or shotgun under circumstances described in subdivision two.
    Criminal trespass in the first degree is a class D felony.