The FBI Vault (vault.fbi.gov), which holds scanned primary documents from the Bureau’s historical case files, would presumably contain the original fingerprint records. That material was not accessible during the research period for this article. The Law Enforcement Bulletin article from January 1959, which appears to contain detailed technical discussion of the Dillinger fingerprint case by named examiners, was similarly inaccessible.
These gaps in the accessible secondary and primary record are real limitations. They do not alter the documented conclusion — the identification was positive, the surviving ridges were sufficient — but they prevent the kind of granular technical detail that would allow, for example, reconstruction of the specific minutiae comparison that produced the positive finding.
The limitation is flagged here in the interest of accuracy. The article has used what was accessible. The fuller picture of the examiner-level work remains partly beyond reach in publicly accessible sources.
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## A Decade in Review: What the Files of 1933 to 1934 Meant
Looking back at the full arc of the Dillinger story — from the May 1933 parole to the July 1934 death — several aspects of the case stand out as historically significant in ways that extend beyond the immediate criminal narrative.
The case was one of the first major tests of the expanded FBI jurisdiction created by the federal anti-crime legislation of the early 1930s. The Dyer Act prosecution, the harboring charges against Sage and others, and the eventual prosecution of the surgeons and lawyers who had assisted Dillinger all relied on federal statutes that had been recently strengthened or newly enacted. The Dillinger case was, in this sense, a real-world test of the new federal law enforcement framework.