Mistrial
One of the principles of criminal law that best illustrates the importance of having an experienced criminal defense attorney by your side is what is called a mistrial. Simply put, a mistrial can be declared when something happens during a trial that is unfair to one side or the other and is so damaging to the aggrieved party that it necessitates abandoning the trial and starting all over. Most often, this happens in jury trials when the jury becomes "tainted" by being exposed to evidence that should not have been allowed in at trial or in some other way that would cause the jurors to treat one side unfairly.