Just after about 8:30 mins:secs in.
The guy seems genuine to me. A lot of these stories do. The b/s ones from official sources are usually I have a problems with. Mainly because they are put together in a concocted way for some reason. Pieces of a puzzle that don’t fit, even though the newspapers talk all about it. Just like Joshua Thompson says in a previous link.
Daniel Marvin is the author of the book, Expendable Elite (2003). He was working on a book about William Pitzer entitled The Smoking Gun: The Conspiracy to Kill LCDR William Bruce Pitzer when he died on 19th January, 2012.