Final answer:
The Constitution requires that all confessions or admissions must be knowingly and voluntarily made after being informed of Miranda rights, including the right to remain silent and the right to an attorney, as established by the Supreme Court in Miranda v. Arizona.
Step-by-step explanation:
The Constitution requires that all confessions or admissions must be made with an awareness of one's rights and with an explicit waiver of those rights.
This legal standard was established by the Supreme Court in the landmark case Miranda v. Arizona, where it was determined that safeguards must be in place to protect against self-incrimination, as outlined by the Fifth Amendment, and to ensure the right to an attorney per the Sixth Amendment.
In this context, the coercive nature of police interrogations was recognized, and the Court mandated that the accused must be informed of their rights, commonly known as Miranda rights, before any confession or admission can be considered valid in a court of law.
Hence, a confession is only admissible if it is given after the suspect has been made aware of the right to remain silent and the right to have counsel present during interrogations.