isolated case. care cary continues to be one of the safest places. reporter: isolated? how could she know really. and we still have not named a suspect or person of interest. reporter: oh, but nancy s family had. the very day krista learned her twin sister was missing, she called brad. and i asked him point blank at that point, what have you done? where is she? she didn t wait for an answer. she just hung up the phone. then the day after nancy s body was identified, her family went to court to try to get those two little girls away from brad. by 4:00 in the afternoon, we had papers in the judge s hand for temporary custody of nancy s children. reporter: the family acted so fast because, according to their complaint, brad s behavior was so disturbing. before she disappeared, they d seen emotional abuse. and they were sure she never went jogging july 12th. and then after she went missing?