What is the test for obtaining a search warrant de novo?

This court reviews issues regarding the validity of search warrants de novo. United States v. Hale, 784 F.2d 1465, 1468 (9th Cir.) cert. denied, 107 S.Ct. 110 (1986). The standard by which the sufficiency of a warrant is measured for probable cause is whether the supporting affidavit contains facts demonstrating there is a fair probability that evidence of a crime will be found in a particular place. United States v. Wiegand, 812 F.2d 1239, 1242 (9th Cir.) cert. denied, 108 S.Ct. 164 (1987); Gates, 462 U.S. at 238.