In the event that someone is found guilty of a crime during a criminal trial, there can be an element of shock and disbelief, especially if the defendant feels as though the trial was unfair, or additional evidence that challenges their guilt was not available at the time of trial. The initial trial conviction isn't always final, and there are a couple ways that the case can be examined again.
One of the guarantees of the Sixth Amendment to the U.S. Constitution is the right for an accused person to have an attorney, or counsel, in a trial with charges against him/her. If there is a deficient performance by that counsel, and the result of the trial may have been different had it not been for that specific performance, an accused person may appeal a conviction under the terms of ineffective assistance of counsel through the Sixth Amendment.
A new Supreme court case gives hope for prisoners and individuals convicted of crimes where they have received incorrect information in some instances - In Lee v. United States 582 US ___ (2017) the court held that: