The "train station" that Walker and Lloyd go to is based on the "Zone of Death" loophole in the real Yellowstone National Park. The United States District Court for the District of Wyoming has exclusive jurisdiction over the entire park, including the parts in Montana and Idaho. The 50-square miles of Yellowstone in Idaho are uninhabited. Any crime committed in Yellowstone would be tried in federal court in Cheyenne, Wyoming. However, the Sixth Amendment states that juries in federal criminal cases must be made up of citizens who are from the district and the state where the crime was committed. The loophole postulates that it would be impossible to field a jury if a felony or misdemeanor was committed in the Idaho portion of Yellowstone as no one lives there, suggesting that a defendant would be unable to receive a trial and therefore could not be legally punished. As of 2022, no known felonies have been committed in the Zone of Death.