They must "make public what they may have kept inside," Roht-Arriaza said. "It opens up the nation to conversation. It lets people see that the justice system works."
Looking into the eyes of some of the victims in the courtroom, it's hard to know if they reflect pain or faith or peace -- or the relief of a weight lifted.
As the witnesses detail their horrifying stories, Rios Montt sits just a few feet away, expressionless. Listening.
As Isaacs put it, this "in itself is a form of justice."