I wasn't assuming anything, I was just asking how the work product for a SAR got outside the Bank.
What was the SAR attached to the subpoena? You say it wasn't the original. Was it just a blank SAR form or was it a copy of a previously filed SAR?
The SAR in itself is not some big secret. You can find a blank form online. You can also research things on the FinCEN site and find out SAR requirements, procedures, etc. So anyone can obtain that information easily.
If you can maybe provide more info, I'd be glad to answer any questions. I had worked with law enforcement and federal agencies on several investigations that were started by a SAR that I'd filed. I've received subpoenas, etc. I'm just not 100% sure what your situation is and what you are asking.