Final answer:
The practice of interrogating individuals without notifying them of their right to counsel and protection against self-incrimination is a violation of the Fifth Amendment, established by the case Miranda v. Arizona.
Step-by-step explanation:
The practice of police officers interrogating individuals without notifying them of their right to counsel and protection against self-incrimination has been deemed by the courts to violate the Fifth Amendment. The landmark case Miranda v. Arizona established that suspects must be informed of their rights prior to any questioning by police when they have been taken into custody or otherwise deprived of their freedom in a significant way. This includes the right to remain silent and the warning that anything they say can be used against them in a court of law. Moreover, suspects must be aware of the right to consult with an attorney before and during questioning and to have an appointed attorney if they cannot afford one. These procedures are designed to ensure that incriminating statements made by a suspect are truly voluntary and not the result of coercion or intimidation.