Which case established the principle regarding the self-incrimination privilege during custodial interrogation?

The principle regarding the self-incrimination privilege during custodial interrogation is primarily established by the case of Bram v. U.S. This landmark decision set a significant precedent by ruling that defendants have the right to not incriminate themselves, which is a fundamental aspect of the Fifth Amendment. Specifically, the Court held that statements made during interrogation are inadmissible if they are not made voluntarily, emphasizing the need for law enforcement to inform suspects of their rights, thus protecting individuals from coercive interrogation practices.

In the context of custodial interrogation, this case has had lasting implications on how law enforcement conducts interrogations, reinforcing the requirement of providing Miranda warnings to ensure that individuals are aware of their rights to remain silent and have counsel present. This safeguards against any involuntary self-incrimination that could arise during police questioning. The principles from Bram v. U.S. laid the groundwork for subsequent rulings related to self-incrimination and fair treatment of suspects in custody.