Over at the motel, Olivia finds ID for "Loraine Daisy Alcott," and Peter makes fun of her name, and then finds something to sample in the bathroom: a little bit of orange gel on the sink. Olivia seems to find this significant, and then she notes that the woman's things were left behind, but not his. She squats down to examine the sheets. Peter jokingly asks if she's checking the thread count, and she says that's exactly what she's doing. Then she shines her flashlight on a cabinet and asks Peter to open it up, predicting there'll be sheets in there. There are. "OK, how'd you do that?" asks Peter.
Olivia goes stomping outside. "That's how he would do it," she mutters, adding that this guy she's talking about would go to the motel rooms first and replace the sheets with medical-grade leak-proof linen, to prevent any blood spills. She explains that there was a serial killer, victims in New York and New Jersey, that she and John investigated, but they never caught him. Peter tells her she can't beat herself up because she didn't catch "the bastard" on her "first try," although I think Loraine Daisy might beg to differ, and then Olivia yells at Peter because she has to reexamine all the cases she and John worked together, to see if there was something she missed.
Peter wisely decides to focus on the case right in front of them, and asks her how the killer did it. For this, she has no answer.
Driving back from the crime scene, Olivia tells Peter that this was one of the first cases she and John investigated together. The killer would murder five young women within a few days of each other. He'd take them back to a motel, give them a muscle paralyzer; they'd be wide awake but unable to move. He'd make an incision along their gums, and then -- oh my GOD -- pull their mouths open up to their eyes, go in through their nasal cavities and take out a piece of their brains. Peter handles this description about as well as I do, but he collects himself in time to ask how this all connects to "magic old man baby" and the pregnant woman. I can't believe "Magic Old Man Baby" is not the title of this episode. She has no idea, but says the killer used an orange gel as a muscle paralyzer, just like this guy. And if it is indeed the same guy, that means he's going to kill again.