Five witnesses say something happened. Several others testify they are not aware of the incident. The accused claims to not remember. If on a jury, would you not find the testimony of those who weren't aware as irrelevant.
If 5 "Democrat leaning" witnesses waited nearly 50 years to tell a story, after the alleged victim is dead and the alleged victim's family denies the story, then I would tend to seriously question the story of the alleged "witnesses." Sounds like a smear. Guilty until proven innocent.