Post-conviction relief is a general term that relates to actions post-trial and the verdict has been rendered. It may include such things as appeals of criminal convictions, requests for release, new trial, modification of sentence, and other actions that may be proper.

Yes, Louisiana does have a provision for Post Conviction Relief (PCR). It can be found in the Louisiana Code of Criminal Procedure Article 930.

If the schizophrenic person was sent to prison and it was determined that the person belonged in a mental hospital instead and had belonged in a mental hospital at the time the crime was committed, then post conviction relief exists through the court system. If it is too late to use the court system, then post conviction relief exists through the pardon system.

The question is much too broad and covers too wide a topic in order to give a generallized answer.

A defendant can seek relief from a guilty verdict by filing an appeal, presenting new evidence of innocence, or filing a motion for post-conviction relief alleging constitutional violations or ineffective assistance of counsel.