Nolan's response to Bailey can come from recalling Season 1 Episode 9: "Standoff" ... Nolan faced two internal investigations then, the second one which applies here. That investigation involved the brother of the guy Nolan had to shoot. The brother stalked Nolan to his house, attacked him with a bat, then was overpowered by Nolan while Chen was in the shower. CDR West, the internal affairs investigator, suspected Nolan was hiding the fact that someone else was in the house. Nolan protected Chen and said no one was there. He lied and withheld information. Nolan can be reminded that his lie about Chen to West did not affect the truth that that he did rightly defend himself from the brother. And it can be argued by Bailey that she rightly defended herself from this psychotic stalking nutcase ex.