I recently filed a SAR on someone for possible involvement in a mortgage fraud scheme based on a hunch I had and inconsistencies in the person's story. I now have evidence from the prosecuting attorney that substantiates my hunch. Do I amend my already lengthy SAR (five pages of narrative) and simply add this new info to the end, or do I file a new, follow-up SAR, summarizing the first SAR and adding the new information?

I just had a similar situation.

I filed a supplemental SAR - refrencing the one I just filed - & just adding the new information.