Jury service is a positive, even transformative, experience for many jurors. Prior research establishes that jurors who deliberate on a court case develop more positive views of courts in the relatively short time of jury service, but we know little about the reasons underlying why these positive changes develop. This research focuses on changes in jurors' views after serving on criminal cases because jury service is one of the few opportunities community members have to participate directly in the criminal justice system, with jurors acting as the conscience of the community regarding the extent of prosecutorial power. Unlike most work using actual jurors, this research utilizes surveys with jurors both before and after jury service to understand how jury service brings about increased trust in courts. We examine the influence of three categories of potential factors, deliberating on a case, juror satisfaction, and jurors' attitudes relating to law and justice, finding all three categories work together to significantly predict whether jurors' trust in courts increases, decreases, or stays the same. Policy suggestions include developing innovative ways to capitalize on the positive and overall legitimizing aspects of jury service in criminal cases by increasing community members' meaningful involvement in the courts.