To be fair, I have no knowledge of the trial other than that her daughter was murdered and that the general consensus was she did it. Thing is, their was no alternative idea for Todd until years after his sentencing.
Edit, this might not be the exact definition of "moral" but thing is, unless we can clearly figure out what happened, if we let her go chances are she is not going to murder anyone else (should she be guilty) and if we give her the chair we risk killing an innocent woman. Keep in mind this is assuming we don't have enough information to convict her nor few enough evidence not to convict her. Chances are though it'll be clear cut (one way or the other).
Edit, this might not be the exact definition of "moral" but thing is, unless we can clearly figure out what happened, if we let her go chances are she is not going to murder anyone else (should she be guilty) and if we give her the chair we risk killing an innocent woman. Keep in mind this is assuming we don't have enough information to convict her nor few enough evidence not to convict her. Chances are though it'll be clear cut (one way or the other).