A former teacher in Ohio who admitted raping two boys he met at a Boy Scout camp was sentenced on Monday to 14 years in prison.

Daniel Burris, who resigned as an elementary school teacher for Westerville City Schools in 2013, will spend a mandatory 11 years in prison for the rape conviction and will serve another three years for unlawful sexual conduct with a minor, the Columbus Dispatch reports.

“Boy Scouts is a place young men go to learn how to be good citizens,” Franklin County Common Pleas Judge Laurel Beatty Blunt told Burris. “What you did to those two Scouts is horrific and a betrayal of trust.”

A grand jury indictment accused Burris of molesting the boys in their homes in Upper Arlington while tutoring them in math, including oral and anal sex with one of them when the victim was between the ages of 13 and 16 between June 2011 and July 2013.

Burris resigned from Westerville City Schools in August 2013 after district officials discovered he was dismissed from participating with the group for sending inappropriate text messages to some Boy Scouts.

Burris was also sentenced to three years in prison for gross sexual imposition for the case involving the second boy. That sentenced will be served concurrently along with the 14-year sentence, the Dispatch reports.

Burris will be on supervised release for five years after his prison term and must register as a sex offender for the rest of his life.

“I’m truly sorry for the mistakes I have made,” Burris told the judge.