You're facing criminal charges and want to declare your innocence to the jury. Your lawyer advises against it, but you have the right to insist. So, what do you do? There are serious reasons why you might want to avoid testifying. For one, this could be your first time speaking publicly, and you might come off nervous or unprepared—like a deer in headlights. Prosecutors are skilled at asking trick questions designed to make you look guilty, foolish, or both, no matter how you answer. Once you take the stand, prosecutors can dig into your past, even if your previous run-ins with the law are decades old. If you’ve got a criminal record, it will be brought up and used against you, no doubt about it. In self-defense cases, though, it’s almost impossible to avoid testifying. If you have a competent lawyer, they’ll spend significant time preparing you, going over the kinds of questions the prosecutor is likely to ask. You should expect this preparation to take at least half a day,...