I thought I read that he entrusted the data to the late Leiutenant Quarles Harris, Jr., 578-11-2856, who sadly lost custody thereof by reason of being rubbed out?
The Quarles Harris story is likely just a red herring. He was involved in a credit card fraud ring, and was cooperating with investigators, telling them that he had an accomplice in the State Dept who was helping him by providing info from passport records for the identity thefts. The only connection I’ve found between him and Brennan is that the Washington Times mentioned the article that they did about Brennan in the news story about Harris, without providing any direct link between the two or the two investigations.
It was misleading, because they said Harris was a “key witness” in a State Department investigation, then they mentioned the Brennan investigation. Harris was a witness in a different investigation, though, as far as I have been able to determine.