Treavor A. Beck, 19, New London, is charged with first-degree sexual assault of a child and possession of drug paraphernalia.
According to the criminal complaint, two girls, ages 12 and 13, went to a party at an apartment on North Water Street in New London. While there, the two girls consumed alcohol.
During the party, Beck allegedly took the 12-year-old girl into a closet and began fondling her.
The girl told police they later went into a bedroom and had sex.
New London police executed a search warrant at the apartment and seized a glass pipe commonly used for smoking marijuana.