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When a person is arrested and taken into custody they must be read their rights. What supreme court established this, and name one of the rights that must be said.
What is Miranda v. Arizona
“You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to an attorney. If you cannot afford an attorney, one will be provided for you. Do you understand the rights I have just read to you? With these rights in mind, do you wish to speak to me?”