Seven-year-old Kyron Horman vanished more than two years ago from his school science fair. Kyron’s stepmother, Terri Horman, was one of the last people to see him as she dropped him off at school that day.
Kyron’s biological parents both believe that Terri Horman knows something about what happened to Kyron, but she was given two polygraphs. Police also searched Terri Horman's home and her vehicle.
Terri Horman has never been charged in this case. But now for the first time, there is a legal document calling her a prime suspect.
Jane Velez-Mitchell sat down with Kyron’s father, Kaine Horman. For more on this story, watch Jane Velez-Mitchell weeknights at 7 p.m. ET on HLN.