4. Miranda v. Arizona (1966)
In 1966, the Supreme Court ruled in Miranda v. Arizona that law enforcement must inform suspects of their rights before interrogation. This decision established the “Miranda warning,” requiring police to advise individuals in custody of their right to remain silent and to have an attorney present during questioning. This ruling transformed law enforcement procedures nationwide, ensuring that confessions are obtained voluntarily and with full awareness of constitutional rights. (britannica.com)
