Per-roll Hearing

Jesse brings the case against her dad, Jim. They get together once a week to play Settlers of Catan. When the dice rolls start to favor Jesse, Jim accuses her of not rolling sufficiently. He then makes her use what he calls the "Cup of Shame" to ensure that the dice are rolled properly. She says there is nothing suspect about how she rolls dice, and that the Cup of Shame is unnecessary. Who’s right? Who’s wrong?