James,
1) Even Mumia is entitled to a presumption of innocence until proven guilty beyond a reasonable doubt. If his trial was a sham, his guilt was not proven beyond a reasonable doubt.
2) Mumia is a prisoner of the State and target of continuing harassment and repression by the prison system which holds him. Any notion that he is in a position to "defend himself against all charges" would be laughable if the consequences of his inability to do so were not so tragic.
3) Mumia is not required to say anything about his guilt or innocence. It is the State that is required to establish his guilt. He is not supposed to have to establish his innocence. That is the meaning of "presumption of innocence."
4) On what basis have you determined the evidence points to his guilt preponderantly so? Have you been privy to evidence that was presented at his admittedly faulty trial? Have you read the record of his trial? Are you aware of evidence that was not put into evidence at the trial that establishes his guilt beyond a reasonable doubt? Have you interviewed the jurors? Or could it be that you are relying on depictions of his guilt provided conveniently by the Philly mass media based on information provided by the same characters and institutions that railroaded him in the first place?
5) I only wish that your passion for justice were as strong as your passion for retail trade.
6) There are many examples of the ineptitude of the criminal injustice system and why capital punishment is wrong. Mumia happens to be a leading example whose life is on the line NOW. If you cannot bring yourself to rise to his defense, which of the other victims of this system are you rising to defend? Or is it a case of rejecting every case you confront until you find one that makes you comfortable enough to get past your own biases and warped sense of justice?
In solidarity, Michael