Keep in mind that the root of any Fourth Amendment question goes back to the Fourth Amendment's protection against unreasonable searches and seizures. The Fourth Amendment protects you against illegal search and seizure.So does the Texas state constitution. As part of the Bill of Rights, the Fourth Amendment to the U.S. Constitution guards against any actions of unreasonable search and seizure. The answer is the fourth amendment which prohibits unreasonable searches and seizures of property and individuals. Were you arrested and subject to a police search and believe you were a victim of an unlawful search? Call Houston TX criminal defense lawyer Matt Horak. Fourth Amendment Explained. The answer is the fourth amendment which prohibits unreasonable searches and seizures of property and individuals. A search warrant is needed whenever law enforcement officers want to conduct a search or seizure.