Lori Vallow and Chad Daybell are in police custody in Idaho after the remains of Lori's two children, Tylee and J.J., were found on Daybell's property, according to police. Daybell has been charged with concealing evidence, and Vallow is accused of desertion and nonsupport of children. Both have pleaded not guilty. Now, it's been revealed that authorities used cell phone pings from the phone of Lori's late brother, Alex Cox, to determine where to search for the children. Alex's mysterious death earlier this year is leaving even more questions. Access legal expert Alison Triessl explains what it all means.