The responsibility for filling out your petition rests with you, the plaintiff. If you are under investigation, the criminal process has begun.Explore expert answers on the Leatherman v. Tarrant County case and the requirements for pleading specificity. In general, Texas has very few official legal forms. This post will take you through the Tarrant County Criminal Process. On this page, you should fill in the location that the document is to be filed with, either the trial court or the Court of Appeals. Talk to a lawyer if you have questions. Step 1: Fill out these forms. This procedural guide covers generally applicable rules of motion practice in the Tarrant County Superior Court.