Damien explains what happened in the woods: He met Katy in the finds shed and said, "look on that shelf" (21.21), then clunked her with a rock—twice. She tried to scream, so he twisted a plastic bag over her head, then he carried her into the woods. But someone else was there, so he wrapped her in a tarp and hid her overnight. While cleaning up the blood, he heard noises outside—"Scratching at the walls […] sniffing round the edge of the door" (21.48). The next night he put her on the altar stone.
He admits to inventing the story of the big guy in the tracksuit.
Cassie thinks they should get Rosalind, because she and Damien gave the same fake lead.
Rob reminds her that Jessica gave them the lead, but Cassie thinks Rosalind fed Jessica that info.
He whines that Cassie never liked Rosalind anyway and says she's just out to get her.
Cassie calls Rob "an embarrassment to this entire f***ing squad" (21.101), and goes to get Rosalind herself.
Meanwhile, Rob tries to find out Damien's motive, but Damien can't stop crying.
He sends Damien away to be held for the night, and realizes that Cassie has been interrogating Rosalind.