Final answer:
To be valid, a search warrant must indeed be issued by a judge and served by law enforcement, as it is a legal document that allows police to conduct searches and seizures. While this is the baseline requirement, there are notable exceptions where a warrant is not needed.
Step-by-step explanation:
To answer the student's question: to be valid, a search warrant must be issued by a judge and must be served by a law enforcement official, this statement is true. Search warrants are legal documents that are signed by a judge or magistrate which give law enforcement the authority to search and/or seize persons or property.
However, there are exceptions to the warrant requirement. Law enforcement can conduct a search without a warrant if the owner or renter consents, if there are exigent circumstances such as a reasonable expectation that evidence may be destroyed or tampered with before a warrant can be issued, or if the items in question are in plain view.