Deb comes into Dexter's office, whereupon he reports that the print unfortunately didn't yield a database match. DVO wonders if this means Deb will let him do things his way, but she's got this Bobby on her mind. Dexter thinks no one calls an adult "Bobby," and I can't think of any way to disagree without offending someone, so I'm just going to let it go. Dexter speculates that the "it's" suggests childlike blame, like he's saying it's Bobby's fault and just because he's going to prove to be right doesn't mean I don't think it's bullshit for him to jump to that conclusion. Deb sighs that she wishes they could run the print against juvie records, but those are sealed and she manages not to bring up Hannah, instead moaning that they're back to Square One before leaving. Dexter, however, is like, "For you, maybe," and what a mess this is. First off, if Deb were ever going to sanction Dexter to do things his way, it would be now; she's run up against a legal roadblock and it's obvious the PA -- who doesn't mind killing kids -- will strike again. And as for Dexter, if he's going to break the promise to Deb, you'd at least think he'd point out that reasoning; it seems as callous and cavalier as... well, most things he does.
Anyway, irrespective of my numerous complaints, Dexter's breaking into the records hall and running the print; like, wouldn't it be more realistic for him to be thwarted by a simple password every now and then? Anyway, obviously he finds a match -- a floppy-haired younger version of the PA -- whose history of arson goes back to when he was twelve and only got out of a psych ward a month earlier. I mean, I know the juvie records are sealed, but shouldn't someone from said psych ward be putting two and two together right about now?
In the hallway, Dexter says to no one in particular that now that he has proof, his urge to kill the PA is beyond his control. No one in particular asks Dexter how he came up with the Dark Passenger construct anyway and Dexter always assumed he got it from no one in particular, but no one in particular tells him that that's not the case -- maybe Hannah is right and the Dark Passenger is just a feeling. Dexter realizes that if that's the case, he's responsible for everything he's done and it's nice that he's stopping to have this little epiphany while hanging out RIGHT BY THE OFFICE HE JUST BROKE INTO.
LaGuerta and Captain Jack arrive at the land on which the cabin once stood, now occupied by a trailer. LaGuerta knocks and when the owner appears, LaGuerta introduces herself and asks if he owned the property back in spring 2007. When he affirms that he did, she asks if he rented it to Doakes, but after he recalls Doakes was the BHB, he says that he told police at the time no -- he rented it to "Santos Jimenez, some kind of Colombian drug guy, not that I knew at the time." Hmm. Are the Colombians circling back into the picture? LaGuerta looks deflated at the apparent dead end, but Captain Jack offers that the name sounds awfully familiar...