WELLINGTON, Kan. (AP) — A former Wellington High School band instructor has been sentenced to 16 months in prison for sexual exploitation of a child.

Thirty-year-old Ben Olson was sentenced Thursday in Sumner County District Court. He pleaded guilty in March after admitting that he had a nude photo of a 17-year-old girl.

Olson apologized in court for his actions. He said he was recently admitted to a center to address his mental health.

The victim and the mother also spoke in court. They said Olson had betrayed their trust after the girl looked up to him as a friend and “father figure.”

Olson was suspended from the Wellington district in November and fired in April.

As part of his guilty plea, Olson must register as a sex offender.