Have a question my ex husband is locked up I want to serve him divorce papers will he get to come over to the hearing from the jail trying to find out don't want to see him n kinda scared if they let him he will not let the divorce go through I want him gone we have been separated almost 4 years

You can serve him divorce papers. You can divorce him without him ever having to appear in the court proceedings. Find out his location and send him the papers. If he doesn't respond, then the judge will grant the divorce with nothing more. If he responds, then it'll take a few months before it is finalized. You'd be better having a lawyer help you navigate this so that it's done correctly.