Richard Bert Mosley (defendant) was arrested for robbery. Before questioning, Mosley was given the Miranda warnings and invoked his right to remain silent. The officer stopped the interrogation, and Mosley was taken to a cell. Later, a detective attempted to question Mosley about an unrelated murder. Mosley was again given the Miranda warnings, but did not invoke his right to remain silent. Mosley made incriminating statements and was charged with first-degree murder. Mosley moved to suppress his statements because the detective’s questioning took place after Mosley invoked his right to remain silent. The trial court denied Mosley’s motion. Mosley was convicted by a jury and received a mandatory life sentence. The United States Supreme Court granted certiorari.