An airman with the 10th Mission Support Squadron based at the Air Force Academy was charged Wednesday with raping a female airman on New Year’s Eve, a newspaper reported.

Airman 1st Class Ricardo Villamil also faces a charge of unlawful imprisonment for allegedly holding the woman against her will, according to The Gazette of Colorado Springs, which cited court documents. He waived his right to hear evidence that could be used against him at a court-martial.

Academy officials said allegations against Villamil, a four-year Air Force veteran, were kept secret for nearly five months because the matter was being investigated. It was unclear whether Villamil had retained an attorney and there was no phone listing for him available.

A court-martial date for Villamil, a four-year Air Force veteran, has not been scheduled.

Air Force Academy Lt. Gen. John Regni last month said having a safe environment for female cadets at the school was one of his focuses.

Commanders at the academy were ousted in 2003 after dozens of female cadets reported they had been sexually assaulted, and that some had been punished for reporting it.