Also known as: knowing and voluntary · knowing-and-voluntary · knowing and voluntary standard · knowing and voluntary waiver · knowing and intelligent
Written by attorneys · grounded in primary & secondary sources — see below
A constitutional requirement that a waiver of rights be made with full understanding of the nature of the rights and the consequences of the waiver, and without coercion.
Kiara Kaur told the judge she wanted to represent herself at trial on theft charges. The court questioned her about her education, prior legal experience, and grasp of the charges and penalties. After determining she understood the proceedings and the risks of forgoing counsel, the judge allowed the waiver.
Karl Klein walked into the station and confessed to murder. Defense experts later testified that his severe mental illness prevented any free choice. The court still admitted the statements because no police coercion occurred and the waiver met the required standard.
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Katherine Kim's attorney requested a competency evaluation before trial. The state placed the burden on Kim to prove incompetence by a preponderance of the evidence. The court upheld the allocation after confirming on the record that any waiver of counsel or trial rights remained knowing and voluntary.
Kira Kapoor, a terminally ill patient, sought a physician's aid in dying under state law. Physicians argued the statute violated substantive due process by barring knowing choices. The court upheld the statute because the prohibition did not implicate a fundamental liberty interest under the governing standard.
Keisha Kincaid made incriminating remarks to a cellmate who was a government informant. She later claimed the statements were obtained without a valid waiver after indictment. The court suppressed the evidence because the deliberate elicitation occurred without a knowing and voluntary relinquishment of Sixth Amendment protections.
Karina Kovacs received Miranda warnings and agreed to speak with detectives. She later moved to suppress her confession, arguing the waiver was invalid. The court admitted the statements after finding the warnings were clear and the decision to talk was made with full understanding and without coercion.
Due process requires that a guilty plea be knowing, intelligent, and voluntary. A plea is involuntary if obtained by coercion or improper threats, including threats directed at third parties. The court must ensure the defendant understands the rights waived and the consequences of the plea.
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A silent or bare record cannot show a voluntary, intelligent plea. The record must affirmatively demonstrate that the defendant understood the nature of the charge and the core trial rights waived, including the right to a jury trial, confrontation, and the privilege against self-incrimination.
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A signed plea form is not constitutionally sufficient by itself. The record as a whole must affirmatively show that the defendant understood the critical trial rights being waived and the consequences of the plea.
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A mass arraignment with only a collective colloquy and no individualized inquiry creates a substantial risk that the defendant did not fully comprehend the waiver. The absence of a personal inquiry undermines the constitutional requirement that the plea be truly knowing and voluntary.
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…as true the undisputed allegations that each of the patients was mentally competent and terminally ill, and that each made a knowing and voluntary choice to ask a doctor to prescribe "medications . . . to be self-administered for the purpose of hastening . . . death." The State does not dispute that each faced a passage to death more…