The following excerpt is from United States v. King, 985 F.3d 702 (9th Cir. 2021):
A "magistrate's determination of probable cause should be paid great deference by reviewing courts." Illinois v. Gates , 462 U.S. 213, 236, 103 S.Ct. 2317, 76 L.Ed.2d 527 (1983) (simplified). When a
[985 F.3d 708]
magistrate has found probable cause, we do not "invalidate the warrant by interpreting the affidavit in a hypertechnical, rather than a commonsense, manner." United States v. Ventresca , 380 U.S. 102, 109, 85 S.Ct. 741, 13 L.Ed.2d 684 (1965). Our duty is limited to ensuring that the magistrate had a "substantial basis" for concluding that probable cause existed. Gates , 462 U.S. at 238, 103 S.Ct. 2317 (simplified).
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