based on your comment:
presumption of innocence? Dead!
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I agree with your disdain for the horrendous acts by these people but your request is a slippery slope. Almost everyone arrested is believed to be guilty based on some "evidence". The arresting officers are always certain. Sometimes, the suspect is actually innocent. Also, sometimes an individual can sometime justify actions that would normally be considered criminal. The term "suspect" is appropriate until the verdict is determined. Keep in mind that when writing procedure or law, you must approach from a general view, not a specific one. If you are too specific, you will allow unintended results.
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I do think that the appeals process should take into consideration the clarity of the evidence to determine the validity of appeals. In cases such as these, they should have a very small number of appeals allowed (as in possibly a single appeal, "just in case") 
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Please, deny your passion for vengeance by honoring true justice.