He's listed as a Forensic Document Examiner at http://www.handwritingfoundation.org/pros/qd.htm
He's not actually a Librarian unless he holds the professional library degree, the Masters of Library Science (MLS). Real Librarians dislike those who give themselves that title simply because they tend a roomful of books --much like someone with a box of bandaids calling himself a nurse.
Marcel Matley: There is nothing in the questioned document that would support any finding of forgery. And the things that are brought forth - the apparent fragmentation - and those things are explained by the fact that we have a deteriorated copy and that fact that the man was under some emotional stress at the time.
Robert Stack: Marcel Matley is convinced that the other experts are wrong. Q1 on the left side represents the "suicide" note. K1 through K11 on the right side represents the known samples.
Robert Stack: Did Vince Foster write the "suicide" note? Were these the final thoughts of a man overwhelmed by the cold realities of politics in Washington or, as critics of the Clinton administration contend, is the note part of an elaborate coverup?
In the end there are still many, many questions to be answered. The ongoing investigation of both the Whitewater scandal and Vince Foster suicide in all likelihood will continue for some time to come. Given the explosive political nature of the case, it is quite possible we will never know the entire story behind the death of Vince Foster.