Using your and the jury’s threshhold of proof, no circumstantial evidence could ever convict. A defense theory that aliens were the culprits and ‘staged’ the scene would yield hours of testimony by experts debating the existence of extraterrestrials and their potential for malevolence.
I honestly have no idea how I would have voted. I did not sit on the jury panel and listen to weeks of evidence and testimony put on by the Prosecution and the Defense.
I do know that 12+ Jurors thought she was Not Guilty.