How It All Goes Down
- They whittle down the suspects to Mark and Damien—of course, Rob thinks Mark did it, for no reason whatsoever.
- Sam mentions that Damien is the only left-handed one in the group, so they call him in first.
- They think it's fishy when Damien insists he's never seen Katy before, because she often hung around the site.
- Meanwhile, Sam is getting nowhere interrogating Mark.
- Rob decides to quiz Damien about Mark. Did he ever hit anyone? Isn't he just the worst? He's not really that cute is he?
- They break for food and feed Damien some pizza.
- Sophie calls Rob to tell him that the trowel was definitely the rape weapon; also, they found Katy's Hello Kitty flashlight under another tarp. Importantly, though, they didn't find any traces of blood in Mark's car.
- Back in the interrogation room, they ask Damien about his alibi: He was home with mommy.
- The catch is that mommy was asleep, and Damien could have snuck out of the house and gone… in the woods.
- They turn the screws on Damien, showing him pictures of Katy, dead and alive, and telling him that they don't think the killer meant to do it—he was a nice guy, a victim of circumstance.
- Finally, Damian confesses: "It just happened" (20.136).
- Rob officially arrests him.