The print on the left is from Wallace's arrest record (1951)
The print on the right was lifted from Box "A", located in the "snipers nest" (1963)
As the Warren Report tells us, there was a single fingerprint lifted from the carton designated "A" in the "sniper's nest" which could not be linked with Oswald, any other employee of the Texas School Book Depository, or any law enforcement officer that had handled the carton. The fingerprint remains in the National Archives, labelled "Unknown."
A group of Texas researchers, connected to Barr McClellan's research lobbied the Dallas archives for some time before being granted a copy of the only existing fingerprints of Mac Wallace, from his 1951 conviction of the murder of Doug Kinser, for which Wallace -- with the help of Lyndon B. Johnson's personal attorney, John Cofer -- had received a five-year suspended sentence, and essentially walked away a free man. On March 9, 1998, A. Nathan Darby, A.L.C.E., a Certified Latent Fingerprint Examiner, and a member of the International Association for Identification, signed a sworn affidavit stating that he found a positive match between the "Unknown" print from Carton "A" and the 1951 print of Mac Wallace. Cardboard retaining fingerprints for a very limited period of time, the fingerprint match would place Mac Wallace -- linked directly to Lyndon B. Johnson by Estes himself in sworn grand jury testimony -- on the sixth floor of the Texas School Book Depository sometime in the morning or very early afternoon of November 22, 1963.
The prints were turned over the the FBI who sat on the information for over 18 months before making a statement that there was no match.
Even though Mark and I were unsuccessful (through our fingerprint investigators) in finding a match, we still feel that there is a distinct possibility that Darby's work is correct. After visiting Mr Darby and consulting with him extensively before his death, a new chapter has been written about the fingerprint in our latest Digital version of "The Men on the Sixth Floor." Included in the chapter are Darby's personal charts and notes.