The US Department of Education’s Office for Civil Rights said Monday it has launched an investigation into the way University of Southern California handled a sexual abuse case against former gynecologist George Tyndall.

The agency said it will review why USC allowed Tyndall to continue to treat students despite reports of complaints dating back to the 1990s.

“No students should ever endure sexual harassment or abuse while trying to pursue their education,” said Secretary of Education Betsy DeVos in a statement.