Something strange happened with my clearance. I had to leave a job because of some mysterious thing that nobody knows anything about or wants to talk about. I started a new job and found out I had a Loss of Jurisdiction in JPAS. It took 15 months to resolve that, partly because of various screwups, but also partly because DISCO wanted to find this mysterious file but nobody knew what it was. Well, I guess they found it, or accepted that it was a ghost, and my TS is active... and then the SCI adjudication process started, and it's even more of a black hole. I've sent Privacy Act requests to everyone I can think of. Every agency either denies that they have any information, or provides one or two redacted copies of strange faxes, or refers me to another agency (from which I also have a non-responsive response).
How do I find out who actually has the background investigation on me and compel them to send me a copy as required by the Privacy Act?