Green walks back and gripes about being treated like a criminal while Anita sympathizes. She tells him that Bunny's gun was the one that killed John and assures him he killed a guilty man. But there's still an investigation, and Bernard comes out and calls Lupo to be interviewed. And this is where things really devolve into a stereotypical cop show. Lupo protests that it was fine that Green left work when he did and that it was a mutual decision to call it quits for the day, while they bully him about what he should have been doing. Then, holding a paper cup of coffee, Cole walks around and gets in his face to ask if Green was lying to Lupo, or if Lupo is lying to them. "Or is it BOTH?" It's overacting, that's for sure. Lupo comes back out, clearly agitated, and after straightening the stuff on his desk he leaves, giving Anita the 'friend in the hospital' line. She seems to get it, says, "Give him my best," and he's out. Next thing he's in his car taking pictures of Cole and Bernard interviewing a witness on a street corner. He gets out and Bernard comes over to meet him, and they have a very gruff, manly argument where Lupo first tries to discredit the guy they are talking to and then says he's still working on John's murder, but Bernard takes him by the arm and leads him away, telling him to back off. Before he leaves, he notes a box of empty liquor bottles.
He was able to trace those, through the box they were in, to being signed for by someone named Katherine Halsey, who he's now trying to bully into admitting she runs the club. She won't look at him and is more concerned with feeding her birds. She finally admits to bartending there, and says that the guy who Cole and Bernard were just interviewing came in that night saying Bunny had pulled a gun on someone -- a common occurrence, apparently. She then says she feels sorry for Green, and Lupo is surprised she knows him. She drops the bomb we all saw coming from miles away, that he used to go there a lot. The last time he was there was a couple of years earlier, when he beat up Bunny; the rumor is that Green owed him money and didn't want to pay. I'll give Jeremy Sisto credit for doing a very good job looking like he's just been shattered to realize his partner isn't who he thinks he is.