""No, it's not any more complex than being shown to be guilty in the first place. If you have the evidence, you get out. If not, you stay in jail.""
Gnu
I believe it is more complex than you allude to. Legal appeals do not have to deal with new evidence. They can and do deal with errors in court.This is indeed complex, and can take years to work out, one way or the other.

Introducing new evidence is no guarantee the court ruling will be considered or the ruling overturned. A new trial can also result. Regardless, I stand by my statement that getting out is an uphill battle, and complex, once you have been found guilty in a court. I am confident the case records would show just that.