MALVERN, Ark. —  Authorities have charged a Malvern High School teacher for allegedly having sex with a 17-year-old student.

Heather E. Carter, 30, of Alexander is accused of having sex with the female student in her home and in her automobile. Police say the girl has since graduated from the school. The Malvern schools receptionist said Tuesday that Carter's resignation was accepted by the school board.

Investigators said the victim and her family did not want to pursue charges. But the case is the second instance of an adult at the school allegedly having sex with a juvenile this year and police said they are obligated to pursue both suspects.

In the other case, substitute teacher Marsha J. Henderson, 35, of Malvern is charged with first-degree sexual assault for allegedly having sex with a 16-year-old boy.

Carter was released on a $3,000 bond. Her plea and arraignment is set for June 21 in Hot Spring County Circuit Court. Henderson is also free on $3,000 bond and has a July 26 trial date.