There are plenty of examples of supposed murders who 'confessed' to a crime that they didn't commit - along with an untold number of examples of faulty eye witness accounts. And what exactly are you meaning by a technicality? You mean like obtaining the confession in an illegal manner? Or a D.A. supporting perjury from a lying eye witness? Happens all the time Marcia - and yeah plenty of examples where the accused was actually innocent.

Perhaps I should have said in my example that there was a video tape of the accused committing the crime. Perhaps then you might believe that he/she were guilty. Do you think that any the criminals in jail ever actually belong there?