Syd’s quest to uncover the real identity of Knox is a long one, and at one point she strikes up an old friend and previous lover, Warren Hendrix (Laz Alonso), from the DEA, to help her in her journey. The two partner up for multiple episodes in their efforts to take down Knox, who has caused a lot of damage in the search to uncover his identity.
But after nine episodes of investigating Knox’s real identity, it’s uncovered that it was actually Warren all along.
Syd’s former flame was the real culprit behind everything, which greatly confuses Syd. Add to that the fact he tries to tell the former DEA employee that she’s got everything wrong about him, and Warren has some questions to answer.
This twist was groundbreaking in the plot, as it threw Syd for a loop, and the cast has to deal with the fallout of this revelation through the rest of the season.
Source : https://www.distractify.com/p/who-is-knox-la-finest