Sandra Cantu's alleged killer Melissa Huckaby may have had another victim?

I live 10 minutes from Tracy, CA where Sandra Cantu was kidnapped and killed by her friends mother that also happens to be a Sunday school teacher. Anyway, while watching the 11 o'clock news, they said another girl came up missing in the same mobile home park (but was returned drugged) 7 years prior and the suspects description matches Melissa Huckaby. Is anyone else purely disgusted by this woman? How could her own child possibly feel growing up to know that her mother killed the little girl she used to play with?