In United States v. Song Ja Cha, the Ninth Circuit held that a 26-hour seizure of a home before a search warrant was executed was unreasonable. As a result, the suppression of evidence was warranted.
The case is: United States v. Song Ja Cha, __ F.3d __, 2010 WL 775238 (9th Cir. Mar. 9, 2010)