You identify them the same way the DOJ has been busy identifying those J6ers that are now in prison.
We now have an administration in control of all aspects of the government and intelligence, as well as tax records.
We know how to do this, just need the willpower.
Easiest way is to follow the money as these guys were all paid.
And you could always pinch those we know about like Epps to regurgitate what he knows.
