[ZX12R]

I have no doubt in my mind that Casey killed Caylee, whether on purpose, in a rage, by neglect, on drugs, drunk or otherwise.

You just said you have no doubt. The jury had an even lower standard. They only had to find that there was no reasonable doubt, in order to convict.

[Anitius Severinus Boethius]

And they had to find that with the evidence presented to them in court. A big difference.