On another thread, Steve M. Galbraith posted an excerpt from a Gus Russo book that mentions Gilberto Policarpo Lopez and the fact that his possible involvement in the JFKA wasn't adequately investigated by the FBI.
FWIW, Gilberto Policarpo Lopez's estranged daughter contacted me here about five years ago and we exchanged emails. She sent me two photos of him, one of which as a young man. It's kinda sepia colored and I put on the Internet. The other is much more recent, and she asked me to not make it public until he'd passed away.
She said he was violently pro-Castro ("his brother fought for Castro in the Congo"), that he was very good at faking epileptic seizures, that he'd never been sick a day in his life, that he sometimes bragged about the big empty airplane that flew him from Mexico City to Havana a couple of days after the assassination, and that, yes, like the "Oswald" that Roger Craig claimed to watch run down the slope from the general direction of the TSBD and get into a Rambler Station wagon on Elm Street about ten minutes after the assassination, he could whistle very loudly -- "he did it all the time when I was young."