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A former employee at a boarding school for troubled youth who gave drugs to students in exchange for sexual favors was sentenced Thursday to prison for up to 15 years.

Geary D. Oakes, 57, was social services director at Cedar Ridge Academy in Roosevelt for 10 years, according to school officials.

Oakes was charged in early December with sexually abusing two 15-year-old boys, as well as giving one cigarettes and the other Vicodin.

After Oakes was fired, a subsequent investigation revealed that two other students had been sexually abused and others were given drugs.

In all, Duchesne County prosecutors filed charges in seven different cases.

Oakes pleaded no contest in June to four felony counts of unlawful sexual activity with a minor and one misdemeanor count of unprofessional conduct.

In exchange, prosecutors dropped five counts of forcible sex abuse, one count of forcible sodomy and six counts of distribution of a controlled substance.

On Thursday, Judge George Harward ordered Oakes to serve one to 15 years in prison.

Stephen Hunt