Chairman Miaow said:
For a serial killer/torturer/rapist, then put the innocent in jail rather than let the guilty go free. One innocent in prison is better than 10 tortured or dead. Almost any other crime then guilty go free.
Except the 10 tortured or dead will still happen and the innocent will still be in jail. I get what you're saying that you would rather not risk they could be the guilty party but then it's even worse. The innocent would be condemned to a good portion of their life in prison for such a crime.
As posted earlier the problem boils down to one strong point. In both situations the guilty party goes free. The difference is the innocent gets unjustly punished in one. Now if you amended the question to ask if it's better a guilty person drags an innocent down to be brought to justice then it might take some more deliberation based on the crime, but as it stands one is just a better choice.