California, United States of America
The following excerpt is from People v. Ramirez, B267429 (Cal. App. 2017):
5. A defendant does not have standing to assert the violation of another person's Fifth Amendment privilege as protected under Miranda, with the exception that a defendant may object to statements obtained from a third party by coercive police tactics. (See People v. Varnum (1967) 66 Cal.2d 808, 812-813; People v. Enriquez (1982) 132 Cal.App.3d 784, 792-793.)
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