Here's the quote from John Kerry. It's in his biography by Doug Brinkley, Tour of Duty.
"I remember well April, 1968 - I was serving in Vietnam—a place of violence -- when the news reports brought home to me and my crewmates the violence back home - and the tragic news that one of the bullets flying that terrible spring took the life of that unabashedly maladjusted citizen."
I know it's Judicial Watch which has a less than stellar performance, but their case is presumably based on FBI files:
Judicial Watch, the public interest group that investigates and prosecutes government corruption, today released recently declassified documents showing that Democratic presidential nominee Sen. John Kerry accepted laundered contributions for his 1996 re-election campaign from the Communist Chinese government and that, in exchange, he may have arranged meetings between Chinese aerospace executives and U.S. government officials. Obtained from the FBI through Freedom of Information Act and Privacy Act requests, the documents are related to the FBI’s “Chinagate” investigation into the Clinton campaign’s acceptance of contributions from Communist...
http://freerepublic.com/focus/f-news/1199485/posts