Had a friend back in the seventies who was arrested for a robbery he did not commit. He was just a victim of circumstance.....in the wrong place at the wrong time. He spent 6 months in jail before the person who actually committed the crime was arrested for another robbery and confessed to the crime my friend was accused of.
The kicker.....he failed a polygraph and they automatically assumed he was guilty. I will never submit to one...ever. There were no eye-witnesses, and the robber wore a ski mask during the robbery, and his means of escape was unknown. It was a convenience store robbery, and my friend happened to be the first one to enter the store after the robbery. There was no one behind the counter when he entered, he waited a couple of minutes, then left the store. As he was leaving the parking lot, the store clerk, who had been bound in the back of the store, freed himself and saw my friend's car leaving the lot. He phoned in the description of the vehicle he saw to the police and my friend was pulled over a mile or so away. There were no clothes in the vehicle that the clerk had described the perp as wearing, no money....absolutely no evidence tying him to the crime, yet he was arrested and held for six months because he could not afford bail!
I wonder how many are sitting in prison, innocent of any crimes? Some prosecutors are so hungry to build themselves up as crime-fighters that they are willing to go after anyone who they think they can convict, regardless of guilt., and that just sucks.