In which case did the Supreme Court rule police must inform suspects of their rights before interrogation?

The ruling in Miranda v. Arizona established the requirement that law enforcement must inform suspects of their rights prior to any custodial interrogation. This case arose from the circumstances surrounding Ernesto Miranda, who confessed to a crime without being informed of his right to counsel or his right against self-incrimination. The Supreme Court determined that the lack of this information violated Miranda's Fifth Amendment rights and established a critical procedural safeguard for suspects in police custody.

This ruling led to the creation of what are commonly known as "Miranda rights," which include the right to remain silent and the right to an attorney. These rights must be communicated to a suspect before any questioning can take place, ensuring that any statements made during interrogation are done voluntarily and with full awareness of the suspect's legal rights. This decision significantly shaped law enforcement practices and procedures in the United States, emphasizing the importance of protecting individuals from self-incrimination during the interrogation process.