. >> reporter: this gap-toothed little boy is kon horman, smiling in front of his tree frog project on june 4th, 2010, the day the 7-year-old disappeared, seemingly without a elementary school. his stepmother terry horman took that lastt photograph of him. >> when you see that picture now what goes through your mind? >> just -- take him home. just go home. >> reporter: kyron's face was splashed across televisions and billboards, terry appearing on television alongside her husband cain and kyron's biological mother. >> we know how difficult and stressful this is but your memories and statements can help us find him. >> reporter: only days later cane and desiree young began questioning terry saying they thought she may have something to do with his disappearance. the dark shadow of suspicion has followed her ever since. >> did you have anything to do with his disappearance? >> no. none. and i don't -- i don resent you asking that question, but it hurts my heart to -- to even be asked. every sense of the word, he's my son. horman says she's spepeing out to set the record straight, an abc