Richmond County school safety Lt. Richard Roundtree said the sheriff's office granted an arrest warrant Tuesday afternoon for Tiffiny Robinson on sexual assault and enticing a child for indecent purposes.
Robinson, 28, is a five-year employee of the school and serves as assistant coach of the girls basketball and girls softball teams, Principal Thomas Norris said.
"Your gut reaction is you hope this is not true, but your professional says you must check it out and clean it up," Norris said.
At a news conference Tuesday, Superintendent Frank Roberson said the administration first learned of the allegations Thursday.
"The allegation, if proven to be true, is unacceptable and will not be tolerated in our school system," Roberson said.
During a Valentine's Day dance at the school Thursday, a parent of another pupil told Norris her children had heard rumors of the alleged incident.
Norris initiated a preliminary investigation Friday, and the case has been turned over to the district's Office of Professional Standards and Department of School Safety and Security, Roberson said.
At least four pupils and faculty members have been interviewed during the investigation. Roundtree said that the sexual relations reportedly occurred off campus and that he does not believe there are additional victims.
"We feel confident to move forward in the criminal process," he said.
Robinson has been placed on administrative leave while the investigation is being conducted.