Skaneateles teacher pleads guilty to having an inappropriate relationship with an underage girl.

SKANEATELES -- A school district may have a resolution soon as it expects a letter of resignation from a teacher who pleaded guilty to having an inappropriate relationship with an underage girl.

William Milham pleaded guilty in Onondaga County Court Thursday to charges of third-degree criminal sexual act.

In September, Elbridge-based state police charged Milham with three counts of felony sexual act. The charges revolve around a sexual encounter Milham had with a student younger than 17 about five years ago, according to troopers. Authorities believed the Syracuse man had an ongoing relationship with the female student.