What is the test for establishing that a warrant issued by the federal district court on remand is a valid search warrant?

Our jurisdiction over this appeal rests on 28 U.S.C. 1291 (1982). We focus here on the findings and conclusions of the district court on remand. All purely factual findings are reviewed under the clearly erroneous standard. United States v. McConney, 728 F.2d 1195, 1200 n. 5 (9th Cir.) (en banc), cert. denied, 469 U.S. 824, 105 S.Ct. 101, 83 L.Ed.2d 46 (1984). Whether the agents' reliance on the warrant was objectively reasonable is reviewed de novo. United States v. Dozier, 844 F.2d 701, 707 (9th Cir.), cert. denied, 488 U.S. 927, 109 S.Ct. 312, 102 L.Ed.2d 331 (1988).

B. Probable Cause