After the jury has been selected, the jurors must stand and take an oath or affirm that they will “well and truly” try the particular case for which they have been chosen, that they will wait until all the evidence has been heard before making up their minds, and that they will follow all of the judge’s instructions.
Jurors must pay attention throughout the trial and do their best to determine the credibility of each witness. Jurors are not permitted to discuss the case among themselves or with anyone else until all the evidence has been presented, the attorneys have made their closing arguments, and the judge has instructed the jurors about the law that applies to the case. Jurors may not do any independent investigation of the matters involved in the lawsuit, and they may not discuss the case with anyone outside the courtroom until after they have deliberated in the jury room and arrived at a verdict. Even then, they don’t have to discuss the case with anyone, although they are allowed to do so after the case has been decided.