Maryland v. Pringle, 540 U.S. 366, 6 (2003)

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Cite as: 540 U. S. 366 (2003)

Opinion of the Court

concept—turning on the assessment of probabilities in particular factual contexts—not readily, or even usefully, reduced to a neat set of legal rules." Gates, 462 U. S., at 232.

The probable-cause standard is incapable of precise definition or quantification into percentages because it deals with probabilities and depends on the totality of the circumstances. See ibid.; Brinegar, 338 U. S., at 175. We have stated, however, that "[t]he substance of all the definitions of probable cause is a reasonable ground for belief of guilt," ibid. (internal quotation marks and citations omitted), and that the belief of guilt must be particularized with respect to the person to be searched or seized, Ybarra v. Illinois, 444 U. S. 85, 91 (1979). In Illinois v. Gates, we noted:

"As early as Locke v. United States, 7 Cranch 339, 348 (1813), Chief Justice Marshall observed, in a closely related context: '[T]he term "probable cause," according to its usual acceptation, means less than evidence which would justify condemnation . . . . It imports a seizure made under circumstances which warrant suspicion.' More recently, we said that 'the quanta . . . of proof' appropriate in ordinary judicial proceedings are inapplicable to the decision to issue a warrant. Brinegar, 338 U. S., at 173. Finely tuned standards such as proof beyond a reasonable doubt or by a preponderance of the evidence, useful in formal trials, have no place in the [probable-cause] decision." 462 U. S., at 235.

To determine whether an officer had probable cause to arrest an individual, we examine the events leading up to the arrest, and then decide "whether these historical facts, viewed from the standpoint of an objectively reasonable police officer, amount to" probable cause, Ornelas, supra, at 696.

In this case, Pringle was one of three men riding in a Nissan Maxima at 3:16 a.m. There was $763 of rolled-up cash

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