Outside the precinct, Deb is meeting with her contact in records about her dad's shady, cheating past. Her contact -- whose name I can't think of for the life of me -- tells her she'd be better off spending time with her man than digging through old Confidential Informants her dad might've diddled. Deb cheerfully ignores that sound advice. She needs to know that her perfect father wasn't so perfect. WHY she needs to know the specifics when she already knows he cheated is pretty much what makes Deb Deb. And why I love her self-destructive ass. Dex walks past and right into an irate Quinn, who tells him about picking out a suit for the kid whose father was killed by Benito Gomez. The same Benito Gomez Dexter's shoddy preparation just helped get exonerated. He doesn't want Dexter's apologies, just to shove Gomez's case file into Dexter's hands so he'll know what he's done to his victims (it's some gruesome, eyes-out-of-sockets stuff). And presumably feel terrible about screwing up. Of course, Quinn doesn't know that Dexter doesn't feel anything (bad news) and will most definitely atone for his fuck-uppery by killing the everloving crap out of Gomez (good news!). Anyway, Deb gets Quinn to back off, but even she is amazed to hear Dexter made such a huge mistake.
Inside, LaGuerta has assembled the homicide division together to get a look at the aqua green power suit she's rocking today. Also to run down the day's cases. Quinn's still staring shillelaghs through Dexter's skull, prompting Masuka to offer to do whatever Dex needs to "get that angry Irish off [his] ass." Which, because it's Masuka, probably means something I can't type without blushing. LaGuerta announces a new case she wants Deb and Quinn on, and Dexter should go too since there's "a lot of blood."
When they get to the crime scene, we see all that blood is helpfully contained in the bathtub, with the victim. Yep, it's Lithgow's crime scene, only all the blood that overflowed out of the tub when he killer her has been meticulously cleaned up. Dexter marvels at the pristine nature of it all ("He obviously doesn't have kids," he voice-overs), while Masuka makes the obligatory "bloodbath" joke. Deb notes the absence of a murder weapon, which rules out a suicide. Masuka agrees: "The coroner can suck my uncircumcised dick if he doesn't rule this a homicide." "TMI," rules Deb, as we all heartily co-sign. Quinn pointedly tells Deb to keep Dexter on task if they actually want to see the perp who did this go to jail.