What event triggers the legal process leading to Miranda's Supreme Court case?

The legal process leading to Miranda's Supreme Court case is triggered by his confession to a crime. In the landmark case Miranda v. Arizona, Ernesto Miranda was arrested for kidnapping and rape and subsequently confessed after a lengthy police interrogation. However, he was not informed of his rights to remain silent or to have an attorney present during questioning. The confession became pivotal in the case as it raised questions about the protections against self-incrimination, which are guaranteed by the Fifth Amendment. This issue led to a legal challenge that ultimately reached the Supreme Court, resulting in the establishment of the Miranda rights, which require law enforcement to inform individuals of their rights upon arrest. Thus, the confession serves as the crucial event that catalyzed the legal proceedings surrounding Miranda's rights.