. >> brad farrington, cassy's estranged husband. through a nasty custody battle. >> as soon as we found out she was dead, we all thought it was him. >> cassy's family told detective watkins that cassy had been living in fear of brad for years and wasn't shy about saying so. >> he had her convinced he was gonna kill her. >> watkins listened to their stories. many stories. one, when cassy's mom was right there watching. >> he has her against the wall on her side, but he has her in a headlock. >> didn't you wanna call the police? >> yes, but i felt like if i did anything, he would hurt her. >> and she would wake up during the night and he'd be in the dark, standing over her, watching her. >> that's creepy. >> yeah. that is the first time she said, "he's going to kill me. " >> and she really believed this? >> yes. >> the first time? >> uh-huh. >> how many times? >> she told me at least three times. >> and then there was this, what brad did to the kids. binding their hands and feet together, even taping the baby's mouth. cassy told her m