This is supposed to have happened 8 years ago, and it is still “under investigation”.
It does not pass the smell test.
The actual letter does not say the matter is under investigation, it says the information requested is "contained in a TBI investigative case file. That record is confidential under Tennessee Code Annotated..."
Mueller’s biggest screwup is the framing virologist Steven Hatfill when it was clearly obvious the evidence was pointing to the mentally ill Bruce Ivins. This seals Mueller’s reputation as a rush to judgement knee jerk. Plus, when the evidence could no longer be ignored he sent his underlings to the podium to eat crow. Typical 7th floor Beta couln’d man up and apologize for destroying Hatfill’s life to pad his career.