Which resource is NOT typically used in criminal investigations?

In the context of criminal investigations, various resources are utilized to gather pertinent information, track down suspects, and analyze data. The National Crime Information Center (NCIC) provides vital information on stolen property, wanted persons, and more, making it an essential tool for law enforcement. The Department of Motor Vehicles (DMV) databases are often accessed to obtain information on vehicle ownership and to find registered owners of specific vehicles, which is crucial in many investigations. The Automated Fingerprint Identification System (AFIS) is another critical resource used for fingerprint analysis and identification.

Commercial ad listings, however, do not serve a direct purpose in criminal investigations. While these listings could potentially provide incidental information, they are not specifically designed or reliable for investigative purposes. Law enforcement typically relies on official databases and systems that are built for the purpose of aiding investigations, unlike commercial advertising, which is more focused on consumer sales. Therefore, this option stands out as not typically being utilized in the field of criminal investigations.