There's a thin line between devotion and obsession, and crossing it is deadly. Danielle Madison has spent the eight years since her ninth birthday channeling the devastation of her best friend's murder into catching pedophiles online. Being the one to have found Kira's body, she can't forget the brutality of the crime. Worse, she's sure Kira wasn't the murderer's first victim. Since he was never caught, she's...