US intelligence has a lot of overhead photography of this compound because we knew US POWs were there during the war and we photographed it often. We assembled some of these photos of the compound and showed them to the source. He pointed, emphatically, to the second story balcony where he claimed to have stood when he made his sighting, and equally emphatically to the water tower with the cistern at the bottom. There is one problem. US intelligence was able to obtain hand-held photographs shot from the street that also showed that it is impossible to see what this guy claimed to have seen.
Problem is that spot is hidden behind the same building.
The guy was polygraphed and the results were inconclusive when he was asked is he had seen people who were identified to him as US POWs. Based on the reports from seventeen other stories and on the impossibility of seeing what this guy claimed to have seen, we concluded that he was not telling the truth. In fact, in the early 1980s, Hendon and a group of Congressmen went to Hanoi. They went to the Ly Nam De compound where Hendon and then-Congressman Bob Smith barged in past the gate guard. They searched around the compound until they found a covered cistern at the side of a building at which time they announced that they had found the cistern that DIA could not find, that this proved the validity of the original sighting and of Garwood's sighting.