(b) A person commits the offense of burglary in the first degree when, without authority and with the intent to commit a felony or theft therein, he or she enters or remains within an occupied, unoccupied, or vacant dwelling house of another or any building, vehicle, railroad car, watercraft, aircraft, or other such structure designed for use as the dwelling of another. A person who commits the offense of burglary in the first degree shall be guilty of a felony and, upon conviction thereof, shall be punished by imprisonment for not less than one nor more than 20 years. Upon the second conviction for burglary in the first degree, the defendant shall be guilty of a felony and shall be punished by imprisonment for not less than two nor more than 20 years. Upon the third and all subsequent convictions for burglary in the first degree, the defendant shall be guilty of a felony and shall be punished by imprisonment for not less than five nor more than 25 years.
He entered the house. He apparently committed theft (stole the boots). He was guilty of burglary in the first degree, and facing 1-to-20 years, open-and-shut case.
This explains why he charged the guy with the shotgun.