K-9s, or police dogs, are specially trained canines used by law enforcement agencies to assist in various tasks. These dogs are often trained in areas such as search and rescue, narcotics detection, and tracking suspects. Breeds commonly used for K-9 units include German Shepherds, Belgian Malinois, and Labrador Retrievers due to their intelligence, agility, and strong sense of smell. K-9s work alongside their human partners, known as K-9 handlers, to enhance public safety. They play a crucial role in locating missing persons, detecting illegal substances, and apprehending criminals. The bond between a K-9 and its handler is vital for effective teamwork and successful operations.