> an ALLEGED dangerous serial killer was brought into court and there was only one compelling piece of evidence, but it was obtained in an extremely unlawful manner
.. then it's quite possible that the person is innocent and the evidence is wrong. After all, if someone is willing to break the law to get evidence, why wouldn't they just fabricate it?
See http://www.innocenceproject.org/ which has managed to overturn a large number of convictions by finding contradictory evidence, especially from DNA.
To be fair most of these cases are not due to unlawfully acquired evidence or evidence that was fabricated altogether, so it's not a direct comparison.
.. then it's quite possible that the person is innocent and the evidence is wrong. After all, if someone is willing to break the law to get evidence, why wouldn't they just fabricate it?
See http://www.innocenceproject.org/ which has managed to overturn a large number of convictions by finding contradictory evidence, especially from DNA.