The following excerpt is from U.S. v. Rosa, 626 F.3d 56 (2nd Cir. 2011):
A violation of the Fourth Amendment does not necessarily result in the application of the exclusionary rule, however. "Indeed, exclusion has always been our last resort, not our first impulse." Herring v. United States, 555 U.S. 135, 129 S.Ct. 695, 700, 172 L.Ed.2d 496 (2009) (internal quotation marks omitted).
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