Visit rotten.com's library article on Mumia (it's well written and gore free - under "biographies" and then "crime"). Ultimately, he did it. What it comes down to is that he was both guilty and the cops investigating went overboard and probably framed him in addition.
I'm a longtime liberal and even I have to admit it. Mumia's guilty. Even Michael Moore has called him out. He did it. Really.
A cop killer who garners sympathy soley because of his skin color.
Dude, if only I was black like Mumia, I would have national interest my murder case, but unfortunately I'm white and I just sit here rotting on death row without self-hating fools trying to get me out of jail.