I watched most of those hearings in the early '90s that's exactly what happened. Anyone presenting evidence that POWs might still be in SE Asia was treated like a hostile witness by McCain.
“Dime store Rambos”
One of McCains kinder terms for the humint sources of where live sightings were reported
Maybe some of the men who never came home knew more about the “Peace Commitee” than Senator McCain was willing to expose
treated like a ....wacko bird?