COLORADO SPRINGS, Colo. -- The family of a 13-year-old Denver girl who had a sexual encounter with a cadet is seeking an unspecified amount of money from the military.

Cadet Robert Ryan Burdge, 22, in February pleaded guilty at a court-martial to consensual sodomy with a minor and impeding an Air Force investigation. He was sentenced to two months in prison, received a dishonorable discharge and was ordered to pay the Air Force $120,000 for his education.

The family's attorney, Dan Boho, on Tuesday said he was working on the paperwork for the claim. A claim was filed with the Pentagon in June, he said.

Burdge, a National Merit Scholar from Hopedale, Ohio, told jurors he thought the girl was 16 or 17. He met her at a weeklong sports camp the Air Force Academy hosts every year.

Burdge said he went to the girl's dormitory on June 21, which was off-limits to men, and escorted her back to his room. There, he kissed her and received oral sex, an act the military considers sodomy.

The girl never reported the incident. It came to the academy's attention in October while investigators were looking into another case.

During Burdge's sentencing hearing, Boho and the family thought the prosecution should have made a stronger case, perhaps calling the parents or presenting videotaped testimony by the girl.

The family sent a complaint to academy superintendent Lt. Gen. J.D. Dallager but never heard back.

The letter mistakenly went to the Pentagon, the father learned later.

The girl dropped out of high school after five weeks of classes in the fall because of rumors that she lied during the investigation and was to blame for the incident.

Some of the girl's classmates learned about the incident during the investigation.