Which case required law enforcement to inform suspects of their constitutional rights before interrogation?

The case that required law enforcement to inform suspects of their constitutional rights before interrogation is Miranda v. Arizona. This landmark Supreme Court decision established that individuals in police custody must be informed of their rights, specifically the right to remain silent and the right to an attorney. This is crucial because it protects the Fifth Amendment right against self-incrimination and ensures that any confession or statement made by the suspect during interrogation is made voluntarily and with an understanding of their rights.

In Miranda v. Arizona, the Court highlighted the inherent pressures involved during police interrogations and the importance of ensuring that suspects are made aware of their rights to avoid coercion. This ruling led to the creation of what is commonly known as "Miranda rights," which are now a staple recitation in police procedures when arresting individuals. The case significantly impacted law enforcement practices and the legal landscape surrounding the rights of the accused in the United States.