cindy zarzycki became one of those "have you seen this child" faces on the back of store coupons. forever 13 years old. she'd walked off to dairy queen on a sunday morning in 1986 and was never seen again. >> she looked up to me. i let her down. >> why do you say that? >> because i wasn't there. >> cindy's older sister, connie, had been away from the house that weekend. her kid brother eddie was also tortured with guilt. >> we should have been there and helped her out. >> you should have tagged along? >> yep. >> we have seen how that the power of love has healed. >> in 1994, eight years after her disappearance and commemorating cindy's 21st birthday, the zarzyckis held a candlelight vigil in front of the family home.