The Prosecution can’t proe she was killed with duct tape. There were no soft body tissues left - only a skeleton and duct tape. The duct tape could have been applied post mortem.
Her mother’s behavior was abnormal, but then she is a very abnormal human being - that doesn;t necesssarily equate to murderer.
The Prosecution failed to produce SOLID EVIDENCE that Casey murdered her child, just a series of pictures of a very abnormal individual.
Look at the Chloroform searches. The Prosecution called in two experts - one claimed over 100 hits on that subject were found, the other only one.
You have skeletal remains with duct tape and with DNA indication on the duct tape, you have the mother’s car with a stench of death in it.
You have conflicting testimony from the father.
We know the kid is dead. We know that some untoward actions were taken with respect to the remains. We know the mother has abnormal responses to the death. That’s all - nothing more.
Not at all a common event, and it's one of the few possibilities I probably will never look up on the internet.
Applying duct tape post mortem is equally unlikely.