Why didn't Cindy Anthony want to know where her granddaughter was in the month she was missing?

one more thing that doesn't make sense, I think she knew darn well or had a pretty good idea of exactly what happened and helped Casey cover it up and lied on her behalf. Then I think she got scared about being charged with a crime herself and that's why she reported Caylee missing and started acting like the concerned grandma. I don't think she'd have any qualms about throwing Casey under a bus to save herself, from all accts they had a rocky relationship at best.