Over at the hospital, Avery chews out a nonchalant Casey because of their little stunt baiting the Bartletts. (Wasn't Baiting the Bartletts a celebrated documentary at Sundance not too long ago?) She also says the word "shenanigans," which pleases me. Pierson, sporting a shiner, tells Avery he wants to apologize to P.J., but Avery says he doesn't want to talk to his dad, and Pierson wants her to convince him. Pierson says to Casey and Olivia that he and his son have his differences (Well, I suppose, if "in favour of plowing my son's fiancée/not in favour of Dad plowing my fiancée" counts as a "difference") but P.J.'s not a killer.
That's a conclusion Olivia's already coming to, and Casey wonders if they should be looking at the dad. But as they observe father and son embracing, Olivia realizes they're not going to be able to turn son against pop, so they're going to have to find something tying Pierson to the murder.
So that means Elliot heads over to Jenna's apartment to harass Ryan the Forensics Wizard who's dutifully trying to find some fingerprints in the charred remains. Nothing yet, but he's recovered some more burnt fragments from Jenna's desk. Elliot shuffles through them, and a particular e-mail catches his eye. "We were wrong," he says, and we cut to a conference back at the station, where Casey informs Avery and the Bartletts that she's charging them with conspiracy to commit murder.
She slides over the printed e-mail, which she says outlines the Bartletts' plans to buy a coffee plantation in El Salvador, which would make them significantly richer. Casey wants to know how Jenna got her hands on it. Pierson also inquires of his son how Jenna (or, in his words, "stupid tramp") had it, and P.J. says she must have stolen it from his briefcase. Pierson calls his son stupid, and they bicker until Avery finally shuts them up. Casey says Jenna was going to spill the beans on their top-secret deal, and Pierson should get his own lawyer.