Killer Instinct by Jennifer Lynn Barnes

The book picks up a few weeks after the events of the first novel. Cassie Hobbes and the other teens in the elite FBI program are still reeling from their last case and are now confined to working on cold cases under the watchful eye of a new, by-the-book supervisor, Agent Sterling . Their forced break from active duty is shattered when a young woman is found murdered on a university campus, her body staged in a way that is terrifyingly familiar .

The killing is a perfect copycat of the methods used by an infamous incarcerated serial killer: Daniel Redding, the father of fellow Naturals team member, Dean . Forced to confront the traumatic legacy of his father, Dean is drawn into the investigation, and his teammates refuse to let him face it alone . As they dig deeper, they discover that the copycat is just one piece of a larger, more sinister game orchestrated from behind bars .

As the bodies begin to pile up, the Naturals must race against time to outsmart a killer who seems to know their every move. The investigation becomes deeply personal, forcing Dean to confront his father and pushing Cassie and the team into a deadly confrontation with a killer who has deadly plans for them all .