Which amendment provides protection against unreasonable searches and seizures?

The Fourth Amendment is the source of protection against unreasonable searches and seizures. It establishes the principle that individuals have a right to privacy and security in their homes, persons, and belongings. The amendment specifically requires that any search or seizure must be reasonable and typically mandates that law enforcement obtain a warrant supported by probable cause before conducting searches. This legal framework is designed to protect citizens from arbitrary or invasive actions by the government, ensuring that law enforcement must have a justifiable reason for intruding into an individual's privacy.

This amendment plays a crucial role in maintaining the balance between law enforcement needs and individual freedoms, reinforcing the rights of citizens against potential government overreach. This foundational element of the Fourth Amendment has been pivotal in various legal cases that shape American privacy rights and procedural justice.