Writ of Coram Nobis
Definition - What does Writ of Coram Nobis mean?
A writ of coram nobis is a formal request from a court of appeals to a judge in a different court to re-examine a case that has already been concluded. The reason why such writs are given is because sometimes evidence comes out after the fact, that could possibly change the judgment of the case. "Coram nobis" is Latin for "in our presence."
Justipedia explains Writ of Coram Nobis
An example of a circumstance where a writ of coram nobis could be used is if a court of appeals realizes that there was another eye witness to a crime who never made a testimony during the trial. An eye witness account definitely has the possibility to alter a judgment, so the court of appeals may send a writ of coram nobis to the judge who tried the case to request that he or she reopen the issue.