California v. Greenwood

In California v. Greenwood, 100 L. Ed. 2d 30 (1988), the Supreme Court of the United States considered whether police violated the Fourth Amendment by searching trash that had been left outside a home for collection.

The case arose in Laguna Beach, California. Police suspected respondent Greenwood of drug activity. Rather than first obtaining a warrant to search the home, officers arranged for garbage collectors to pick up garbage bags that Greenwood had left at the curb for regular collection and turn those bags over to police. The trash was in opaque, sealed bags, but it had been placed outside the home for pickup.

Police searched the garbage and found items that supported their suspicions. That information was then used to obtain a search warrant for Greenwood’s home. The search of the home led to evidence of narcotics activity. According to the dissent, police examined Greenwood’s trash repeatedly over a period of time, but the exact full timeline and all investigative details would need source verification beyond the provided material.

The California courts treated the garbage search as unlawful and suppressed the evidence. The State of California sought review in the United States Supreme Court.

The plain-English question was whether the Fourth Amendment requires police to get a warrant before searching and seizing garbage that a person has left outside the curtilage of the home for collection.

Put another way, the Court had to decide whether a person has a reasonable expectation of privacy in trash bags placed at the curb for pickup, even if the bags are closed, opaque, and contain personal information.

The Supreme Court held that the Fourth Amendment does not prohibit the warrantless search and seizure of garbage left for collection outside the curtilage of a home.

Justice White wrote the opinion of the Court. The Court reasoned that once Greenwood placed his garbage at the curb for collection, it was readily accessible to others. Garbage collectors, strangers, animals, children, scavengers, or other members of the public could have come into contact with it. Because Greenwood exposed the trash to the public in that way, the Court concluded that he did not have a reasonable expectation of privacy in it for Fourth Amendment purposes.

The practical rule from California v. Greenwood is that, under the federal Fourth Amendment, police generally may search trash without a warrant when the trash has been placed outside the curtilage of the home for collection. Evidence found in that trash may be used to support probable cause for a search warrant, so long as the trash was lawfully accessible and the later warrant is otherwise valid.

The Court’s decision was limited to garbage left for collection outside the curtilage. It did not give police a general license to enter protected areas around a home, trespass onto property, or search containers located inside the home or within constitutionally protected areas.

For officers and detectives, California v. Greenwood supports the use of curbside trash pulls as an investigative technique under the federal Fourth Amendment. If garbage has been placed out for collection in an area accessible to the public and outside the home’s curtilage, officers generally do not need a warrant to seize and search it.

The case is especially important when building probable cause. Items recovered from lawfully obtained trash may help corroborate tips, surveillance, or other investigative information. That evidence can then be included in a warrant affidavit, provided the affidavit accurately explains how the trash was obtained and what was found.

Officers should be careful not to overread the case. Greenwood does not say that every trash search is automatically lawful. The key facts are that the garbage was left for collection and outside the curtilage of the home. If officers have to enter a fenced yard, walk up near the house, open containers not placed for pickup, or otherwise intrude into a protected area, the legal analysis may be different.

Police should also remember that Greenwood states the federal Fourth Amendment rule. State constitutions, state statutes, local ordinances, or department policy may provide greater privacy protection than the federal baseline. Supervisors and investigators should confirm local law and agency rules before relying on trash searches as part of an investigation.