The New York Times has this lengthy obituary of Paul Boutelle, who was the Socialist Workers Party vice-presidential nominee in 1968. The obituary even has a picture, which is somewhat rare for Times obituaries.
Boutelle changed his name in 1979 to Kwame Somburu. He left the Socialist Workers Party and joined Socialist Action. He died at the age of 81, in Albany, New York, on May 3, 2016.