A recently retired FBI agent, Brian McCauley, was the fact witness at the center of yet another Clinton email ‘scandal’ which broke about three weeks before the November 2016 election. This was the ‘quid pro quo’ story about email classification which broke in mid-October. It turns out that about two weeks before that story came out, McCauley had been placed on retainer by Trump advisor Michael Flynn, a retainer/consultancy agreement which eventually totaled $28,000.
The fees were for research tied to Flynn’s foreign agent advocacy on behalf of the Republic of Turkey.
The payments were $5,000 (10/4/16); $3,000 (10/13/16); $5,000 (11/14/16); $15,000 (12/15/16). see Item 15, in FARA filing.