The Farm
ECW specializes in mapping out the organizational structures of transnational criminal networks (narcotics trafficking, human trafficking, weapons trafficking, etc) by detecting financial transactions.
Such a person, should he have found concerning financial transactions implicating corruption in Renegade's admin, who is also very well versed in how farm-raised agents are trained and play 'the game', who H.R. McMaster revealed was a threat to 'them' by the way he tried to force ECW out of the WH, I'd guess someone like that would be as threatening to 'them' as Flynn.
A "farm trained" agent, ECW, is helping Durham investigate[then unseal indictments of] ex-top members of the Renegade's C_A!
BOOM
https://web.archive.org/web/20170724023354/https://www.theatlantic.com/politics/archive/2017/07/ezra-cohen-watnick/534615/