While state court cases proceed by warrant or arrest, in federal court, your case could involve a target letter. A target letter, explained here in more detail, lets you know that a grand jury is looking into you. If you are a witness or a target, you could be summoned to appear before a grand jury. Of course, you should always have a lawyer to work with if you are facing any involvement in the federal system – because the federal court system, especially federal sentencing, is a very complicated area of law.
If you got charged with a serious felony, you need to start building your defense. The prosecution has training to find evidence against you. So, you need to know how you will counter this evidence when your trial occurs. Most people do not have the experience to create excellent criminal defenses for themselves based on watching