Blood Guy says he tries not to think about it, because if he's right about this, there's a monster running free. Dexter observes Zoe's pinpoint technique at the range and figures no way this woman merely "winged" anyone. No, Dexter's made his mind up, and he's settled in on his next target.
At work, Dexter finds Deb and Lundy on the floor of his office. Ew, no, not doing that. Um, yet. No, they're working on the Trinity files. And they're doing so in secret because LaGuerta's on the warpath. And LaGuerta's on the warpath because Quinn's "reporter fuckbuddy" (thanks, Deb!), Christine, just took the info he stupidly gave her on Lundy's hunt for Trinity and slapped it on the front page. The slant was that this was the shit the PD is wasting their time on while the Vacation Murderers go free. Lundy figures his neverending guest pass at the station is about to expire as soon as LaGuerta spots him. So they're doing research on the third Trinity killing, the next in his cycle. It'll be a bludgeoning, in case you've forgotten, and since Trinity's hewed so close to his old Miami pattern from 30 years ago (i.e. same locales), they figure if they can find where the murder was, they might be able to plot out where the next murder will be. Or they would, if LaGuerta didn't just bust them and call for a briefing. Deb assures Lundy she's down for continuing the investigation after hours. Lundy tells Dexter he feels like he's "this close" to nailing Trinity.
Trinity's at the public library, scouting buildings and floor plans and whatever else he'll need to pull off his next murder. He also manages to shush every rambunctious teenager in sight, carefully maintaining his cover as a crotchety, though seemingly harmless, old man. On the desk next to him, he spots the newspaper with Lundy's photograph disproportionately large below the fold. "FBI's Top Serial Killer Hunter Back in Miami," the headline blares. Trinity takes it all in.