I don't think they really listened to the scientific evidence. There have been murder convictions with less evidence, even convictions where no body was ever found. In those cases, the jury couldn't possibly have known EXACTLY how the person died but they still convicted the defendant. If the defendant is the last person seen with the deceased, they hid the fact that the person is missing for 31 days, and the body is later found hidden & discarded, who else could possibly be responsible?
I was surprised people disliked George so much and found him unbelievable. The only thing I didn't believe him about was "River Cruz". He looked like he was lying when he denied the affair. Obviously Cindy lied about the chloroform searches but I can't realistically say I wouldn't lie for my child if she was facing the death penalty. I discounted everything Lee said because I've never thought he came across as believable about anything. Sad to say, but I think jurors can be influenced based on whether they like a witness or not. They seem to have taken a dislike to George and that made them suspect everything he said.
I tried to watch the trial while imagining what I would be thinking if I was a juror. I know I could not have voted for 1st degree murder, even though I believe that's what it was, because not knowing the actual cause of death would have bothered me. But I fully expected a manslaughter conviction.
Well, the escapades Casey gets up to in the coming years will probably give them all the proof they ever needed that she is a homicidal sociopath.