You’re in another town watching a high school football game and the officials are clearly biased toward the home team. All penalties in their favor, fouls and errors by the other side overlooked, finally they just spot the ball 10 yards closer to the goal posts with seconds remaining and the home team kicks a field goal and wins the game. You see the county sheriff in the stands and beg him to do something about the rampant cheating. But he says the schools make the rules, the athletic district hires the officials, and the game is over, there’s nothing he can do. You hire an investigator to try to prove that cheating occurred and people become upset and call the sheriff who tells you to stop investigating.
Good analogy.