Fifteen-year-old Erica Parsons was last seen two years ago. But she was only recently reported missing by her brother, who said the last time he saw his sister was on November 19, 2011. Erica’s adoptive parents, Casey and Sandy, claim their daughter is alive and well and since December 2011 has been living with Irene “Nan” Goodman, a woman who they believe is Erica’s biological grandmother.

WATCH: Erica Parsons’ Adoptive Mother Describes What She Says Happened The Last Day She Saw Her

In an exclusive interview with Dr. Phil, the couple, whom police say are being uncooperative and are providing false information, explain why they are not concerned that they haven’t heard from their daughter.