California v.Greenwood限制了个人第四修正案对不合理搜查和扣押的保护范围。在1989年的案件中，最高法院裁定警方可以在没有逮捕证的情况下搜查垃圾，因为个人不能声称对垃圾的隐私有所期待。 1984年，联邦禁毒执法人员向当地一名警察Jenny Stracner透露，拉古纳海滩居民比利格林伍德将在他家中收到一卡车毒品。当斯特拉克尔看着格林伍德时，她发现了邻居的抱怨，许多车辆整晚都在格林伍德的家门口停了下来。 Stracner监视了Greenwood的家，并目睹了投诉中提到的车辆交通。然而，单凭这种可疑流量对于搜查令来说还不够。 1984年4月6日，Stracner联系了当地的垃圾收集者。她让他把他的卡车清理干净，把收集在格林伍德家外面路边的袋子收集起来送给她。当她打开行李时，她发现了使用麻醉品的证据。警方利用这些证据获得格林伍德家的搜查令。在搜索格林伍德的住所时，调查人员发现了毒品并开始逮捕格林伍德和另外一人。两人都保释并返回格林伍德的住所;格林伍德家外面的深夜交通持续存在。同年5月，一位不同的调查员罗伯特·拉豪泽（Robert Rahaeuser）在第一个侦探的脚步声中，要求垃圾收集者再次获得格林伍德的垃圾袋。 Rahaeuser通过垃圾分类查看吸毒证据，并重申了获得格林伍德家庭搜查令的证据。警方第二次逮捕了格林伍德。第四修正案保护公民免受不合理的搜查和扣押，并要求警方获得搜查令的可能原因。案件中心的问题是警察在进行无证搜查垃圾袋时是否违反格林伍德第四修正案。普通公民是否有权对房屋前方路边留下的垃圾袋的内容进行隐私？
California v. Greenwood limits the scope of protection for unreasonable searches and seizures by the Individual Fourth Amendment. In the 1989 case, the Supreme Court ruled that the police could search for rubbish without a warrant, because individuals could not claim to have anticipation of the privacy of the rubbish. In 1984, federal drug law enforcement officers revealed to a local police officer, Jenny Stracner, that Laguna Beach resident Billy Greenwood would receive a truck of drugs at his home. When Straker looked at Greenwood, she found neighbors complaining that many vehicles stopped at Greenwood’s door all night. Stracner monitored Greenwood’s home and witnessed the traffic reported in the complaint. However, this suspicious flow alone is not enough for a search warrant. On April 6, 1984, Stracner contacted local garbage collectors. She asked him to clean up his truck and collect the bags collected on the side of the Greenwood home for her. When she opened the baggage, she found evidence of the use of narcotics. The police used the evidence to obtain a search warrant for the Greenwood family. While searching for Greenwood’s home, the investigators discovered the drug and began to arrest Greenwood and the other person. Both were released on bail and returned to Greenwood’s residence; late night traffic outside the Greenwood home continued. In May of the same year, a different investigator, Robert Rahaeuser, asked the garbage collector to get Greenwood’s garbage bag again in the footsteps of the first detective. Rahaeuser looks at drug abuse evidence through the garbage sorting and reiterates evidence of a Greenwood family search warrant. The police arrested Greenwood for the second time. The Fourth Amendment protects citizens from unreasonable searches and seizures and requires the police to obtain possible reasons for the search warrant. The problem at the case center was whether the police violated the Greenwood Fourth Amendment when conducting a warrantless search of garbage bags. Do ordinary citizens have the right to privacy the contents of the garbage bags left by the roadside in front of the house?