JUNEAU — A 27-year-old Watertown man was sentenced to three years in prison on Tuesday for sexually assaulting a 14-year-old girl.

Andrew M. Schommer appeared before Dodge County Circuit Court Judge Joseph Sciascia. Schommer was given a 12-year prison sentence with three years of initial confinement and nine years of an extended sentence. He must pay court costs. He may not have contact with the victim, her family, residence or place of employment. He must complete a sex offender assessment. He must undergo treatment and comply with the sex offender registry. He must maintain absolute sobriety and perform random urinalysis. He may not have contact with anyone under the age of 18 without prior agent approval. He shall not be on the premises of any schools, day cares or parks without his agent’s approval.

Schommer was found guilty of second-degree sexual assault of a child on Oct. 31.

According to the criminal complaint, the girl reported to an officer at Watertown High School on Feb. 8 that she had sex with Schommer. The girl had previously been questioned by the officer after her friend had mentioned that the girl was in a relationship with Schommer.

The girl told the officer that she believed Schommer was her boyfriend. According to the criminal complaint, she had not heard from him since they had sex and now felt that she was being used.

According to the criminal complaint, Schommer originally denied the charges, but later admitted to having sex with the girl on one occasion.