The jury decides if the prosecution has proven the defendant guilty, based on the evidence presented in court. Jurors usually do not hear information about the character of the defendant or the victim, to assure that they decide the case based on the current offense and not on feelings about a persons past behavior or character. Sometimes you may feel frustrated about what facts the judge will and will not allow the jury to hear.
If you decide to watch a trial, you need to understand that you cannot attempt to influence the jury in any way. Some of the evidence and testimony may be very painful to hear, but reacting in any way could be considered grounds for a mistrial. Jury members may feel sympathy for victims, and an outward display of emotion could affect their ability to remain fair and impartial.
Also be careful about conversations in hallways, elevators, restrooms, or even restaurants near the courthouse. Jurors could be present and overhear these comments.

