Lizzie's inquest testimony was enough to get her charged with murder. No doubt
prosecutors couldn't wait for the jury to hear that same incriminating testimony at trial. But the jury never heard it.
Since Lizzie had not been charged with anything at the time of the inquest, she was not allowed to have a lawyer represent her at those proceedings. Neither her lawyer nor the court had advised Lizzie of her rights before, or during, the inquest. Each thought the other had done it. Lizzie's rights had been violated.
Once in awhile lawyer mistakes help defendants charged with a crime. Such was the case with Lizzie's damaging inquest testimony. The judge agreed with Lizzie's lawyer: None of the inquest testimony was admissible.