What can you do if someone was charge with a crime, no evidence against them, threatened to confess?

Get an appellate attorney to look over the matter.

Your question is confusing and requires an attorney consultation. It is not a simple question that can be answered on this type of forum. There are many factors that would need to be considered and evaluated. First of all, since we do not have all the facts, it is not really possible to answer with complete accuracy. What was he charged with? If there was no evidence, how was he convicted and sentenced to 25 years? Was he represented by an attorney in court? Was his confession challenged? Did anyone file a motion to suppress, and if not, why not? I strongly suggest that you contact a criminal defense attorney experienced in post-conviction relief for a face-to-face consultation and give him/her all of the facts surrounding your son's case. He/she would then be in a better position to analyze his case and advise you of your options.

If he went to trial and was convicted by a jury, doubtless his attorney will appeal the conviction. If so, the his statement to the police will be an issue on appeal. There are usually more than one issue that is raised on appeal after a trial, and the appellate court will look to see if he had a fair trial under the constitution, or if any individual issue is such that the case should be reversed or he should receive another trial. On the other hand, if he entered a plea his options are somewhat more limited. You could consult with a good appellate attorney and discuss the case with him/her in more detail.

If he was just sent to prison you might have a right to appeal the conviction and/or sentence. Call an attorney today!