Which act addressed in Article I of the Constitution is a limit of Congress's ability to declare a person guilty of a crime without trial?

A bill of attainder is a law that declares a person or group guilty and imposes punishment without a trial. The Constitution prohibits Congress from passing bills of attainder, so the correct choice is “a bill of attainder.” Habeas corpus protects against unlawful detention, while an ex post facto law punishes conduct retroactively.

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