Well history had one classic example of that that in Rome when Jesus an innocent man was Hung and a guilty man was set free by pilot in his stead...
This is a tough question and sure glad you asked it...I am racking my brain on this one...
On one hand the Guilty man; let us say it was our old pal “Sadam insane”... that would be a major injustice as possibly many more innocent people would lose their lifes or freedom.
Then you had “Nelson Mandela” who was an innocent man jailed for 25 years (correct me if I`m wrong), but as a result of his sacrifice his country men were set free
Ok, based on the above two examples, I would say the guilty man..
Ok who`s next; 0)