I sure don't want to argue the Ramsey case as this one is more than consuming my time. The point was sometimes LE get's it wrong. We have death row inmates getting set free because of new DNA evidence, meaning LE was wrong, juries were wrong etc.... I do believe this is the exception and not the rule but it happens.
P.S. My belief (not to be confused with fact)
Motive:Casey killed Caylee out of jealousy and anger:
* In Casey's mind: Cindy loved Caylee more than Casey, Caylee was the sorce of contention between them, Caylee loved Cindy more than Casey. Casey was quickly becoming the outsider.
To back this up: Cindy's poem: mentions Casey being jealous, 911 call Casey states all they care about is Caylee, 400 page statement Casey talks about how Caylee wasn't upset talking to her but would have been if she talked to Cindy.
Now supposedly Casey leaves the house after a fight where Cindy is kicking her to the curb and going to try to get custody and keep Caylee. Casey's mind see's this as a total rejection of her where "all they care about is Caylee". She thinks they are kicking me out, their own child and keeping precious Caylee. The struggle becomes a competition for the love and acceptance of her parents between her and Caylee. Caylee was winning! Not now though, so sad!