What is the test for "reasonableness" in the Fourth Amendment?

California, United States of America


The following excerpt is from People v. Robles, E064850 (Cal. App. 2017):

"'[T]he ultimate touchstone of the Fourth Amendment is "reasonableness."'" (Riley v. California (2014) 573 U.S. ___, ___ [189 L.Ed.2d 430, 439, 134 S.Ct. 2473, 2482].) And, "'[w]here a search is undertaken by law enforcement officials to discover evidence of criminal wrongdoing, . . . reasonableness generally requires the obtaining of a judicial warrant.'" (Ibid.) "Such a warrant ensures that the inferences to support a search are 'drawn by a neutral and detached magistrate instead of being judged by the

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