Miranda warnings inform suspects of their constitutional rights when being questioned by police. They originated from the 1966 Supreme Court case Miranda v. Arizona, which ruled that suspects must be informed that they have the right to remain silent and request an attorney before and during questioning. The Miranda case involved Ernesto Miranda, who was arrested and confessed to kidnapping and rape without being informed of his rights. His confession was ruled inadmissible, establishing that suspects must be read their Miranda rights to protect against self-incrimination under the Fifth Amendment. Miranda warnings must be given when a suspect is in custody and subject to interrogation. They do not have to be given for basic identifying questions alone.