MACHIAS — A former substitute teacher in eastern Maine faces sentencing after pleading no contest to two counts of gross sexual assault involving an eighth-grade student.

Forty-seven-year-old Dianne Leach of Steuben entered her plea Monday in a Machias courtroom. A sentencing date has not been scheduled.

When she was arrested last May, Leach was a substitute teacher at the Ella Lewis School in Steuben, which serves students from kindergarten through eighth grade. Police said Leach had sex with the student in December 2010 and March 2011.

School officials told the Bangor Daily News that an investigation was launched after a teacher confiscated a cellphone from the victim and saw a text message from Leach that raised concerns.

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