What we see are photographs of the same lab Calleigh and Delko were in -- only taken at night. Speedle explains that these shots were on the rolls in the panic candy box; Calleigh points out that there is now the possibility that Belle may have taken them after hours, and thus planted the dirty footprint in the lab when she did so. Delko thinks that Belle may have taken the isotope too. Calleigh wonders why, and Speedle replies, "To analyze it, to prove that Risher has shabby security. To kill herself -- I mean, maybe she's a martyr for her cause. She wouldn't be the first. The lady does like the press." As much as I like the way Speedle thinks, it's unfortunate that he chose to share his thoughts while Horatio was sneaking into the lab. If the slightly horrified looks on Calleigh and Delko's faces didn't clue him in, perhaps the dark sleeve shifting and out of his peripheral vision might have. Horatio finally speaks up: "I don't agree." Speedle starts a little, but recovers, "These pictures could put Belle inside Risher's lab." Calleigh trots out the chicken dung evidence too. Delko says, "H, all of the evidence points to the fact that Belle took these pictures." Horatio replies, "I understand, but something's not right. We're missing something." Then he disappears again. The Bob-Whites just stand there, acutely aware that once again, they're wrong. You think they'd be sufficiently used to it by now and just shrug it off.
It turns out Horatio vanished so he could go through Belle's closet and inspect her shoes. From her bed, where she's apparently now stationed, she asks what he's doing, and he tells her he's taking her sneakers into evidence. She says irritably, "Come on, Horatio. I can't win my cases with illegally obtained documentation. Going into Risher's lab would be against the law. Besides, I'm not that brave." That makes Horatio smile, and then he's all business again, asking about the film she had in the panic candy box: "You want to tell me about it?" Belle replies, "Do you have sources on the street?" Horatio nods. Belle replies, "Well, then you know. I can't give up this person. They're helping me get the bad guys." Horatio gives in, then asks Belle how she's feeling. She shoots him a wry smile and says, "Never better. But you may want to hurry." Horatio simply says, "Okay," then goes off to inspect her shoes.
Nothing on the shoes. As if we care.
Speedle and Horatio are looking at the photos now, looking for clues as to who might have taken them. Horatio notices something on the door, and says, "That's a levered deadbolt." In other words, there's no freon. Speedle goes for the picture; Horatio looks at it, and says, "That's a new lock, isn't it? So if she took the pictures, she didn't have to break in to do it, did she?" Oh, God, irritation over superfluous questions flooding back...Horatio concludes, "Somebody let her in, which means she was protecting an insider." Speedle mentions that he found the film in the panic candy box, so that may have been what they used to exchange information. They conclude from the camera also found in Belle's office that the insider used that camera to take pictures, so maybe they can peg his or her ID with that. Horatio orders Speedle to harass the fingerprint lab.