I don't see how anyone could not find her guilty of manslaughter. Well actually I can because too often juries don't understand the term beyond a reasonable doubt because they leave the reasonable out of the equation. Of course there was doubt in this case, but reasnable doubt? i don't think so.
He child was missing for a month and she didn't report it, lied to her mom and friends about where her daughter was. Lied to police when the questioned her several times.
Trunk smelled like a dead body.
Chloroform found in the trunk.
Chloroform searches on the computer, which the mom couldn't have made because she was at work at the time.
Duct tape around the girl's mouth.
She was contained in a laundry bag that was part of a matching set that belonged to Casey.
They caught her lying numerous times on camera at the jail.
No evidence that the girl drowned. No evidence or testimony that Casey drowned it was only the assertion of the defense attorney.
It is harder to prove premeditation, but with the computer searches I think the jury could have found premeditation but at the least it should have been manslaughter.
Another problem today is that people think that circumstantial evidence is a bad thing, it is not, it is what most cases are decided on because rarely is there direct evidence like shows such as CSI portray or confessions that happen all the time in those shows as well. People watch these shows and expect to the prosecution to have direct evidence but that is not how it usually works.