If the judgment has come into effect, and legal evidence collection and evidence review procedures have been carried out before the judgment comes into effect, and it is later found that there is evidence missing or new evidence appears, it will generally not lead to a heavy judgment, but it may lead to the change of the judgment result or the re-execution of the trial procedure.
If the key witness or party in a criminal case is not recorded, it may lead to the invalidation of the judgment and the need to hold another trial or retrial the case. If the new evidence is found to have a significant impact on the original judgment after retrial, then it is possible to revise the judgment.