>>tech div trend 12 detective ron goodwyn .n a time warp, convincing her she wasn't at the pool when tricia drowned. innocent 11-year-old emily waited and waited for lou to bring tricia back to life, but she was gone. for years her death remained an accidental drowning. >> i know that it was, because of the story i told, and there's a lot of regret that comes along with that. >> but you're not to blame for this, you get that, right? >> trying to come to terms. >> the control he had over her was unlimited. she would do anything for him. she truly believed he was this person. >> with emily's story he had the evidence he had been seeking for so many years of castro's grievous crimes. >> taste on this little girl's story, what she saw and took part in as a girl you have a murder case. >> yes. >> as if murder wasn't enough emily and sara had more to tell. there were more crimes to reveal, even more ugly stuff. sara and emily were about to take the investigators into their truly diabolical world. >>> coming up, the dark truth at the