What is a search warrant?

A search warrant is a court order issued by a judge that authorizes police to conduct a search of a person or location for criminal evidence, which may be seized and used in court.

To obtain a search warrant under the 4th Amendment's requirements, police officers must write out an affidavit -- a written statement under oath -- to convince a judge that they have probable cause to believe that criminal activity is occurring at the place to be searched or that evidence of a crime may be found there.

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