The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated. Under the Fourth Amendment to the US Constitution, the police are prohibited from conducting a search and seizure without "probable cause."The Fourth Amendment prohibits the United States government from conducting "unreasonable searches and seizures. The Fourth Amendment protects us from unreasonable search and seizures of our person, our house, our papers, and our effects. The Fourth Amendment of the United States Constitution protects us all from illegal searches and seizures. The Fourth Amendment protects us from unreasonable search and seizures of our person, our house, our papers, and our effects. Illegal searches or seizures under the Fourth Amendment are conducted without probable cause. But cracks in the Fourth Amendment have weakened our personal security. The Fourth Amendment establishes that the government cannot search citizens without reason. Summary of Contents.