Introduction Search, seizure, arrest, and reasonableness have been controversial topics in the criminal justice system for a number of years. Interferences with individuals’ privacy expectations have been cited as the major undoing of the criminal justice system. This essay provides an in-depth analysis of the United State searches, seizures, arrests, and reasonableness. Search and Seizures A search is a meaningful interference or intrusion into individual privacy (Waksman & Goodman, 2010). It is premised on collection of evidence in pursuance of criminal activity. Searches can be with or without warrants. Under the federal law, an enforcement officer must obtain a search warrant issued to intrude person’s privacy. However, searches can be without a warrant on the probable causal basis. This is because a federal law enforcing officer may believe that there is no enough time to obtain a warrant to conduct searches for evidence without it (Waksman & Goodman, 2010). Seizures are divided into two namely; the seizures of property and seizures of individuals. A property seizure is the meaningful interference of a person’s possessory interest in his or her property (Zalman, 2011). The government can make an individual reasonably believe that he or she cannot go about his or her business, with the view of ongoing incident circumstances (Zalman, 2011). The seizure of an individual may include a full arrest, detentions on investigation, checkpoint inquiries, or detentions against the will (Zalman, 2011). Search or seizure warrants are issued by a judge or a magistrate if there is a fair probability that the search and seizure will produce beneficial evidence for the wrongdoing (Zalman, 2011). The Fourth Amendment provides warrant-less searches in cases where the warrant clause takes precedence over reasonableness provision. A reasonableness clause protects a person’s right to privacy. A reasonable search and seizure warrants must specifically describe the place to be searched, and the property to be seized. Furthermore, a warrant may also be issued for the property designed and intended for use or used in committing a wrongdoing. According to Waksman and Goodman (2010), a search or a seizure warrant can be issued to officers to allow them arrest individuals found guilty. Reasonable warrants must be supported by probable cause for a search or seizure of a property, or a person. This is to protect citizens against arbitrary violation of their rights, by the government. Reasonableness also plays an important role in restraining the federal government’s action against the aliens. The action that the government takes and the individuals’ expectations determine the action against the aliens. This implies that if the court determines that the government intrusion is unreasonably relative to the person’s protected privacy, then the violation has occurred. Once a reasonable interference with a person’s privacy expectation is established, the law enforcing officer is allowed to obtain a warrant that allows a federal law officer to intrude upon a person’s privacy (Waksman & Goodman, 2010). Warrants are also executed through arrests. In the criminal justice system, arrests take place when a person is taken into custody by a police officer (Zalman, 2011). The criminal justice system starts with the arrests of criminals by the federal officers. The most common arrest is where police arrest individuals after finding them committing a crime. Secondly,