All that came to mind when I read that he had died while walking was Marilyn Monroe and her very convenient suicide and the many deaths during the Clinton years, Arkacides.
There were rumors about Marilyn . She had been with RFK and JFK. Given the recent revelation from the former mistress of JFK and his penchant for telling her to have sex with someone while he was present...it is quite possible Marilyn was involved with both of them.