How have the courts considered the credibility of a jury in a civil case?

In addition, under the trial court's questioning, each juror stated he or she had not been affected by the contacts and could be fair and impartial to both sides. The court was entitled to rely upon those statements "to determine whether a juror can maintain his or her impartiality after an incident raising a suspicion of prejudice." (People v. Harris (2008) 43 Cal.4th 1269, 1304.) We defer to the trial court's credibility determinations when supported by substantial evidence, and the jurors' statements are substantial. (Id. at p. 1305.)

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