James R. Hoffa ALSO knew too much and was “eliminated” in 1975 probably by the Giacalone family in Detroit. In 1975 there began a renewed interest in reopening the JFK case which indeed culminated in the HSCA inquiry...
After the death of Trafficante his lawyer described carrying a message to him and Marcello from Hoffa. It was the JFK should be killed. When the message was given them he said that they looked at each other with a look that meant they took it seriously and was no joke.
After it was done Marcello said Hoffa owed him BIG TIME.