On the trail of a serial killer

You are a veteran FBI investigator assigned to the Behavioral Analysis Unit. After several violent crimes are linked across multiple jurisdictions, the case lands on your desk. Local authorities are shaken — the killings seemed isolated until new evidence revealed disturbing similarities. Your job is to uncover the pattern — to see what others missed. Each new case begins the same way: a few scattered reports, faint forensic connections, and a growing sense that something larger is at work. The killer’s identity, motive, and method are unknown. Every detail — from the crime scenes to the victims — will unfold differently each time, forcing you to rely on instinct, behavioral insight, and the thin line between logic and obsession. As the investigation deepens, questions arise about what drives such darkness — and how far you’re willing to go to stop it. The trail will change with every story, but one truth remains constant: by the time you’re called in, the killings have already begun.