360
Opinion of the Court
case, however, we need not address § 3501's effect, if any, on the rule announced in Anderson. The District Court concluded that there was "no evidence" that a "collusive arrangement between state and federal agents . . . caused [respondent's] confession to be made," App. to Pet. for Cert. 50a, and we see no reason to disturb that factual finding. It is true that the Sheriff's Department informed the Secret Service agents that counterfeit currency had been found in respondent's possession, but such routine cooperation between local and federal authorities is, by itself, wholly unobjectionable: "Only by such an interchange of information can society be adequately protected against crime." United States v. Coppola, 281 F. 2d 340, 344 (CA2 1960) (en banc), aff'd, 365 U. S. 762 (1961). Cf. Bartkus v. Illinois, 359 U. S. 121, 123 (1959).5
III
For the foregoing reasons, the judgment of the Court of Appeals is reversed, and the case is remanded for further proceedings consistent with this opinion.
So ordered.
5 Respondent urges that the judgment below should be affirmed on an alternative ground. Although he was initially arrested on state charges on a Friday afternoon and held in local custody until Monday afternoon, respondent was not brought before a magistrate during this period. In County of Riverside v. McLaughlin, 500 U. S. 44, 57 (1991), we held that the Fourth Amendment generally requires a judicial determination of probable cause within 48 hours of a warrantless arrest. Relying on Mc-Laughlin and Gerstein v. Pugh, 420 U. S. 103 (1975), respondent now asserts that his confession was obtained during an ongoing violation of his Fourth Amendment right to a prompt determination of probable cause. Respondent, however, did not raise a Fourth Amendment claim in the District Court or the Court of Appeals; he argued for suppression based only on the Fifth Amendment and § 3501. Finding no exceptional circumstances that would warrant reviewing a claim that was waived below, we adhere to our general practice and decline to address respondent's Fourth Amendment argument. See Granfinanciera, S. A. v. Nordberg, 492 U. S. 33, 38-39 (1989); Heckler v. Campbell, 461 U. S. 458, 468-469, n. 12 (1983).
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