The work of supporters does matter: Mumia would have been executed 20 years ago were it not for the grassroots movement that grew dramatically during that summer, in 1995. His execution was called off about 10 days before it was to be carried out and less than a week before a massive demonstration in Philadelphia (which went ahead anyway).
The facts of Mumia's show trial are well known, overseen by Judge Albert Sabo, a member of the Fraternal Order of Police and whose courtroom was so one-sided it was known as "vacation for prosecutors." Judge Sabo was overheard telling a court worker that he would help prosecutors "fry" Mumia, referring to him with the N-word. Four witnesses reporting seeing someone flee the scene of Officer Daniel Faulkner's murder; this was concealed from the defense. No check was done to see if there was gunpowder residue on Mumia's hand. The fatal bullet is believed to have been a caliber too large to fit in the gun that Mumia kept in his cab's glove compartment for self-defense. Every "witness" who testified against Mumia later recanted, saying they were coerced or given rewards to falsely testify. (One of the recanting witnesses, Veronica Jones, was actually arrested on the witness stand immediately after her recantation.) Police claimed Mumia bragged that he killed the officer, yet the report made at the time reported "The Negro male made no comment"; a doctor later said that Mumia was beaten so badly that he would not have been physically capable of speaking.
Full report: http://wp.me/p2cpPS-gt