Who is Jesus? Christians have been arguing about the answer to that question since there have been Christians, and it seems unlikely that they're going to agree on an answer anytime soon. Mark Osler, always a bit uncomfortable in church, was never able to find a Jesus that seemed real to him-until he put Jesus on trial.

Drawing on his training as a federal prosecutor and professor of law, he and a group of friends staged the trial of Jesus for their church, as though it were happening in the modern American criminal justice system. The event was so powerful that before long Osler...