Is Casey Anthony guilty or innocent?

I'm trying to figure out if she murdered her daughter or if a babysitter did it. If she's innocent why did she wait 31 days before reporting her daughter missing? Also i heard they took the death penalty off the table then changed their minds and now they wanna give her the death penalty. Does anyone know why they did this? Whoever knows more about this case than I know, please write your opinions, any facts about this case, thanks. I'm watching jury selection on tru tv, quite interesting, also why are many jurors being called back for more questioning?