The Roane County Sheriff's Department arrested Michael Brohard, a teacher and coach at Walton Middle School.

Roane County Prosecutor Josh Downey said the charge involved text messaging.

"It's a very serious allegation at this point that the state is taking very seriously," he said.

The complaint says the victim is a student at the school.

The problem was discovered by the minor's mother, who notified authorities.

Brohard has been released from Central Regional Jail on $50,000 bond.