It was a U.S. Postal Inspector, who working a case involving a mailperson being attacked within the complex came to interview the pair. They gave the inspector the same story they’d been giving their neighbors for a number of years, that they were part “Homeland Security Investigations” (HSI) and were involved in “undercover gang-related investigations, as well as conducting investigations related to the violence at the United States Capitol on January 6, 2021.”
The postal inspector was thorough, detailed, and through his professionalism unearthed sufficient amount of detail to determine that there was something fishy with Taherzadeh and Ali’s claims to be DHS/HSI personnel and reported the duo to the DHS Inspector General.
It did not take the DHS IG long to determine both were not employees and to bring in the FBI to investigate.