The band director at Rogers High School has resigned after a Rogers ISD investigation found evidence of an inappropriate relationship between him and a student, the district confirmed Thursday.

On May 12, a student told the Rogers High School principal that band director Christopher Johnston sent an inappropriate text message that violated district policy, according to school administrators.

Superintendent Joe Craig said Principal Lee Vi Moses launched an investigation and placed Johnston on administrative leave while the investigation was underway.

"At this point, our investigation has resulted in evidence of an inappropriate relationship," Craig wrote in a statement. "We have contacted the appropriate authorities and Mr. Johnston has submitted a resignation."

Craig declined to elaborate on what authorities were involved in the case. The Bell County Sheriff's Office deferred questions to the Rogers Police Department, which did not immediately respond to a phone message Friday afternoon.