Police said they changed not only their own grades, but also the grades of a dozen other students. "We had some young men that did some things that really disappointed us. We're disappointed in their behavior and unfortunately it's impacting the last day for our seniors," said school Principal Dan Burch.
One of the suspects could get up to 38 years in prison for the crime. A second suspect faces three years if found guilty.
School officials said a discrepancy in records led to the arrests. They're now looking at ways to keep it from happening again.