What a pain in the ass. Keywords for 'death of a president', 'secret service', etc, either pull up stuff about that film or information regarding the Kennedy assassination.
Anyway, I did find this after a few searches:
http://www.highbeam.com/doc/1P2-1390398.html
I'm not going to sign up for service to 'Highbeam' or pay for Chicago Sun-Times archives go get a real copy of this article, but I doubt people are sitting around in a room somewhere fabricating false articles in order to get people to pay for archives.
At the same time, the lack of available articles regarding an investigation or the director's quote does provide some ammunition towards the media-bias argument.