“Someone would have squealed by now. “
Or some have? There was a guy (now dead i think) who worked for the cia who said he was one of the 3 tramps arrested on site. He said all tramps were cia backup for the operation, and gave names. Photo comparison of the extant tramps photo(s) and the names given (including himself) was interesting.
At some point in the 90s the original arrest records for those three tramps were found in the Dallas Police files. They were all identified and the living ones interviewed. They were just tramps.