
This episode covers the controversial past of Archbishop Valerian Trifa, his alleged ties to Nazi war crimes, and the forensic investigation that sought to prove his involvement.
Trifa, a Romanian immigrant, claimed to be a victim of the Nazis but was accused by fellow Romanian immigrants of being a member of the pro-Nazi Iron Guard. This group was known for its violent anti-Semitic actions during World War II.
The episode details the efforts of U.S. authorities, particularly prosecutor Eli Rosenbaum, to investigate Trifa's past, which included a hate-filled radio broadcast that incited violence against Jews in Romania.
Key evidence emerged in the form of 22 postcards written by Trifa during the war, which were discovered in German archives. Handwriting analysis by Gideon Epstein confirmed that these postcards were indeed written by Trifa.
The investigation culminated in the discovery of a latent fingerprint on one of the postcards, matching Trifa's thumbprint from his immigration documents, leading to his eventual surrender of U.S. citizenship.
Archbishop Valerian Trifa's Nazi ties were proven through forensic evidence, leading to his loss of U.S. citizenship.

This episode stands out for the following:
They went for the fingerprint to see if they could get it.Forensic Files - Season 5, Episode 13 - Unholy Vows - Full Episode
What we have is paper.Forensic Files - Season 5, Episode 13 - Unholy Vows - Full Episode