Robert Stone Used This Incident From 1972 About A Guy Trying To Throw Robert McNamara Off The Ferry From Martha's Vineyard In A Short Story

Someone told me this morning about this incident from 1972 when a 27 year old artist tried to throw Robert McNamara off the ferry from Martha's Vineyard. I  had never heard of the incident.
Robert Stone used the idea in the story The Wine-Dark Sea that it in his collection of short stories called FUN WITH PROBLEMS. It is my favorite story in the book.
http://www.huffingtonpost.com/greg-mitchell/when-an-artist-angry-abou_b_226870.html

The link below is about FUN WITH PROBLEMS.
http://www.amazon.com/Fun-Problems-Robert-Stone/dp/0618386254#_