The U.S. Supreme Court in Berghuis v. Thompkins rules that the burden is on suspects to invoke their right to remain silent by saying so. The case concerns a suspect who was read his Miranda rights but refused to sign a form acknowledging that he understood them. He then remained silent for nearly three hours of questioning until giving a one-word answer to a question that was used to convict him. The Court says the suspect waived his right when he made an uncoerced statement to police.