Chapter 18

Exhausted from the previous night, Cassie joins Dean to complete Sterling’s assigned readings in criminal psychology. After reading together, Dean proposes summarizing, shifting into an impromptu lesson contrasting disorganized killers—isolated, impulsive, and inept—with organized killers—charming, calculating, and remorseless.

Michael drifts in, needling Dean, and tension flares when Dean pointedly notes that he and Cassie can intuit distinctions Michael questions. Cassie and Dean continue, linking traits to potential behaviors: disorganized killers strike from behind and use improvised weapons; organized killers stalk, take trophies, and revel in control and evasion.

The conversation turns personal as Cassie recalls Locke’s trophies and Dean discloses details about his father’s meticulous, remorseless methods. Their moment is interrupted when Agents Sterling and Briggs arrive.

Briggs reveals that Emerson Cole’s killer is obsessed with Dean’s father and likely sent him letters. The key development: Redding has agreed to help the investigation only if he can speak exclusively to Dean. Despite Sterling’s caution, Dean understands the condition, setting up a high-stakes encounter with his father.