Detective Hanlon is addicted to violence. She likes the rush, the danger, the losing control...
When Hanlon is suspended
...Detective Jane Rizzoli discovers the rest of the body on a nearby rooftop, the head nearly severed. The only clue Jane has is two strands of hair, but it's enough for Forensic Pathologist Maura Isles to make a startling connection. This violent attack has its roots in an unsolved murder-suicide case from nineteen years ago.