If it was my child I too would be hoping she was still alive, but she isn't. My gut tells me she's gone.
I don't think anybody in his position would take the chance that the truth would get out. The jerk who owned the house,[another POS] that runs in the same circles that POS #1 does was probably the one that told him about the little girl, her parents, and where they were staying. He also let POS#1 use his house close to where they were staying.
Murdering the children was also part of their twisted lifestyle.
POS #1 and his brother should be dropped into a large outhouse to live the rest of their miserable lives. They can live on what ever was in the outhouse with them, but never see the light of day.