On appeal, what is the test for determining whether the challenged statements were illegally obtained?

On appeal, we accept the trial court's resolution of disputed facts and inferences and its evaluation of credibility, if supported by substantial evidence, and independently determine whether, from the undisputed facts and those properly found by the trial court, the challenged statements were illegally obtained. (People v. Whitson, supra, 17 Cal.4th at p. 248.)

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