The American official said the team was not to blame. “We have done three investigations down there, and all absolve ISAF forces and Special Forces of all wrongdoing,” the official said, referring to the NATO-led International Security Assistance Force. “It is simply not true.”

Relatives of the victims and their supporters have staged noisy protests in Kabul, the capital of Afghanistan. They say the International Committee of the Red Cross has been investigating the disappearances. In keeping with standard practice, the Red Cross has made no public comment on the matter.

In February, President Hamid Karzai ordered all American Special Operations forces to leave Wardak Province, an area near the capital where insurgents have been active. Afghan and American officials then reached a compromise under which the A Team was removed from the Nerkh district but that allowed other Special Operations units to remain in at least four locations in the province. It is not known where the team that left the Nerkh district went.

Afghan officials investigated the events in the Nerkh district, and when they concluded that the accusations of misconduct by the team were true, the head of the Afghan military, Gen. Sher Mohammad Karimi, personally asked the American commander at the time, Gen. John R. Allen, to hand Mr. Kandahari over to the Afghan authorities.

According to a senior Afghan official, General Allen personally promised General Karimi that the American military would do so within 24 hours, but the promise was not kept, nor was a second promise a day later to hand him over the following morning. “The next morning they said he had escaped from them and they did not know where he was,” the official said.

The American official said the military was not trying to shield Mr. Kandahari. “The S.F. guys tried to pick him up, but he got wind of it and went on the lam, and we lost contact with him,” the official said. “We would have no reason to try to harbor this individual.”

And a spokesman for the American military, David E. Nevers, said General Allen “never had a conversation with General Karimi about this issue.”