United States v. Knights
United States Supreme Court
534 U.S. 112 (2001)
Mark James Knights (defendant) was on probation for a drug conviction, subject to a signed condition allowing any officer to search his person or property without a warrant or reasonable cause. A detective suspecting Knights and Steven Simoneau of vandalizing utility company property saw suspicious materials in Simoneau's truck parked at Knights's home and searched Knights's apartment without a warrant, relying on the probation search condition, finding bomb-making materials and vandalism evidence. The district court suppressed the evidence, reasoning the search was investigative rather than probationary, and the Ninth Circuit affirmed.
Whether the search of a probationer's home for investigative rather than probationary purposes violates the Fourth Amendment.