How does a police dog help policemen?

Police dogs are well trained to smell or find anything which are not good for the society. They are very helpful to the policemen by finding thieves or detecting bombs. Police dogs have now become very helpful to the society because there are very less chances of robbery when a police dog is around.
Police dogs can be trained to respond to different languages and search for bombs, drug, lost people, criminals, and weapons. These are only some of the many things that a police do can do.
look for drugs.