WASHINGTON (AP) — An elementary school principal’s claim that she saw teachers erasing answers on students’ test sheets had reached District of Columbia Schools Chancellor Kaya Henderson’s desk within 24 hours of the alleged incident in late 2010, according to emails obtained by The Associated Press through a public records request.

Henderson was notified about the alleged cheating by two officials with the Washington Teachers’ Union, the emails show. However, school system officials did little to investigate the specific claims and never interviewed the principal about them, largely because possible cheating at the school was already under investigation, school officials said.