Final answer:
Members would most likely utilize the MPD database to find out about dog ownership, as it contains comprehensive records, unlike the other options which have more specific or less relevant functions.
Step-by-step explanation:
Members seeking information on dog ownership could likely utilize the MPD database. A police department's database often contains records on pets and their owners, particularly if the animals have been involved in incidents or licensed. Unlike animal control or a pet detective, which are specific resources potentially used in certain situations, an MPD database offers a centralized repository of local records that members of a police department can access for various information, including ownership of pets. Courts and law enforcement agencies maintain databases for this kind of information which makes them a reliable source. Additionally, although it's less common, the city library might hold historical or public records about local pet registrations that could help in determining ownership. However, the most direct and reliable method for a police department member would typically be to reference their own database.