1. German Shepherd. 
This breed is known for its intelligence, courage, and  versatility. German Shepards are strong, have a keen sense of smell, and can  adapt to many roles in law enforcement, from patrol to specialized detection  work, according to the iHeartdogs.com article.
2. Belgian Malinois 
This breed is like a German Shepherd but has a lighter  build, making it skilled in tasks that demand endurance and quick reflexes,  like capturing fleeing suspects or conducting search-and-rescue missions,  according to the article. These dogs have a strong work ethic and can follow  complex commands, which is why they are commonly chosen for agile, fast, and  intelligent tasks, the article notes.
3. Labrador Retriever
Labrador Retrievers excel as narcotics and explosives  detection dogs because of their friendly nature, calm demeanor and exceptional  sense of smell, the article notes. Labs' patience and adaptability are crucial  in public areas or stressful conditions, according to iHeartdogs.
4. Dutch Shepherd
Dutch Shepherds are intelligent, athletic, and versatile,  making them as capable in police work as German Shepherds or Belgian Malinois,  according to the article. They excel in obedience, agility, patrol, search and  rescue, and detection duties due to their herding abilities, resilience, and  adaptability, the article notes.
5. Bloodhound
This breed has an unmatched sense of smell, making them the  top choice for tracking, the article notes. The report states that they are  valuable for search-and-rescue missions and tracking missing persons or  fugitives because they can follow scent trails for miles over challenging  terrain. 
6. Rottweiler
Strength, loyalty, and a protective nature make Rottweilers excellent  guard and police dogs, according to the article. The report states that they  are often used for suspect apprehension and property protection because of  their intimidating presence and fearlessness. Rottweilers are smart, trainable,  and excel under pressure, iHeartdogs reported.
7. Boxer
Strength, agility, and a fearless nature make boxers a good  choice for police work, iHeartdogs reported. Boxers’ high energy levels and  intelligence make them suitable for a range of tasks such as search and rescue,  narcotics detection, and K9 patrol units, according to the report.