Well he did seem to have information if "the U.S. House Intelligence Committee subpoenaed him numerous times".
He must have sat in at a lot of Deutsche Bank meetings.
Well, did he know Ed Buck?
I wonder if Adam Schiff realized that he needed to clean up some loose ends. (It has been alleged/revealed that Durham has evidence linking Schiff to the origins of the Steele dossier and the Trump frame-up effort going back to the middle of 2016.)