> In 2021, Illinois and Oregon became the first states to ban the use of deception during interrogations of minors ...
Is there any other modern democracy that allows deception as a method of interrogation to the same extent as the US?
In my country, Germany, deception during interrogations is forbitten even for adults. There exist only some minor exceptions, for example, that prior wrong ideas of the suspects may be exploited.
The central paragraph of the law is as follows:
(1) The accused's freedom to decide and exercise his or her will may not be impaired by ill-treatment, by fatigue, by physical intervention, by the administration of drugs, by torment [Quälerei], by deception [Täuschung] or by hypnosis. Coercion may only be used to the extent permitted by the law of criminal procedure. The threat of a measure inadmissible under its provisions and the promise of an advantage not provided for by law shall be prohibited.
(2) Measures that impair the accused's capacity to remember or to reason shall not be permitted.
(3) The prohibition in sections 1 and 2 shall apply without regard to the consent of the accused. Statements made in violation of this prohibition may not be used even if the accused consents to their use.
§ 136a StPO -- German text at https://www.gesetze-im-internet.de/stpo/__136a.html