Around 6 years of age, but it depends on the dog and the state. Belgian Malinois are usually retired at 6 years old.
Most police dogs work until their bodies become old and infirm at which time they are retired. Others may turn out to be temperamentally unsuited for the work and are retired early.

Usually the police officer assigned to the dog is given first choice to keep the dog as a pet when it retires. Police dogs, even retired ones, require special handling and are not generally released as pets to the public.
Police Officers and their K-9's share a special bond as equal partners focused on a common goal. Many police K-9's are specially bread for the work they are intended to preform. K-9's are trained to detect narcotics, explosives, flammable liquids, firearms, mold, termites, and even human scent among other things. K-9's can be trained to find many things because of their keen sense of smell, they can smell a million times better than a human can.

Police K-9's go through a rigorous selection process before they can begin their training. Most police K-9's begin their training at 9-12 months of age. This ensures they are mature and focused enough to do the job.

Likewise, a Police Officer selected to be a K-9 handler is selected only after completing several years as a Police Officer. This ensures the Officer knows their job as well.

A Police Officer and K-9 begin their training together and learn how to work as a team. The handler learns about how to care for his K-9 partner, feed, clean, as well as how the K-9 learns and behaves. The K-9 is also learning a lot about how the handler acts, how they move, give commands and corrections, as well as how to detect an odder.

Police Officers and K-9's communicate in verbal and non-verbal ways. K-9's are trained to understand verbal commands like sit, lay down, and stay. These commands can be given in several different languages as the K-9 only understands tone and inflection in the handlers voice, not the exact word or phrase. K-9's also understand hand signals which command them to do different things, like sit, attack, stay, and come. This insures the ability for the Officer and K-9 to operate covertly or in an area where verbal commands would not work, such as: at a long distances or loud environments.

Many K-9's live with their handlers and their handlers families. This solidifies the bond between handler and K-9 as inseparable partners. Many K-9's have died in the line of duty to protect their handlers, that kind of loyalty is born of trust, commitment, and love.

"He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion."

-- Author Unknown

It depends on what they are used for. A tracking dog - bloodhound Detection dog - Labrador patrol (bite dog) - Belgian Malinois, Dutch Shepherd, or German Shepherd Usually, it's not a particular breed, but bloodlines of a breed that are the best. Police dogs are usually bred specifically for the type of work that they will be performing. It's similar to breeding show winning dogs. You would use the best of the best for breeding, then take the ones from the litter that show the most promise, and start training from there.

Other contributors have said:

Usually, German Shepherds. They are very good attack dogs. Hope this helps!
Well there isn't a specific breed policemen like, but most police dogs are German shepherds or Labradors.
German shepards

Another popular kind is the Belgian Malinois. They look like German Shepherds but are a little smaller and faster. And not quite as handsome imho.
Police use different breeds, depending on what they'll be using the dog for (tracking, scents, ect). While the most common is the German Shepherd, Belgian Malinois', and Blood Hounds are also used. Even the Beagle is sometimes used for drug detection. Hope this helps.
German shepherds are the most common but some use other breeds like labs or mixed breeds.
The most commonly used police dog is the Belgian Malinois (90% of the world's military and police units uses them).

The next most popular dog used (9% of all military/police units use them), is the working-line German Shepherd (which is completely different from the normal or "show-line" German shepherd).

The third most used police dog is the Dutch Shepherd, which is pretty much a Belgian Malinois with a brindle coat.
Fierce or brave type of dog are used police dog
Usually a German Shepherd

There are many different kinds of dogs used in police work. They may be trained in tactics or detection.

Patrol dogs protect their human police partners and may be trained to track and/or apprehend suspects. They may be trained to search buildings for suspects. They may work in corrections facilities.

Detector dogs may be trained to search for narcotics, bombs, lost people, accellerants, cadavers, or contraband.

The specific type of work the dog does determines how long training takes. Training a police canine takes years. Most police departments import their dogs from Europe that have been trained in a sport such as Schutzhund, KNPV, or French Ring. They then modify the training that the dog has already received for street work. A police canine is trained in obedience, bite work, tracking, agility, handler protection, detection (Narcotics, or EOD). A lot goes into the training, most police canines are around - at least 2 years old before the canine is trained enough to hit the street. For some drug sniffing dogs, you put the drug into a towel that has no scent of it's own, then let the dog sniff the towel, then you hide the towel, then tell the dog to find the towel which you have cleverly hidden with other towels that have other things wrapped up in it. Later you move to different towel, then in a long time, soak the towl in perfume and hide it. After a VERY long training period, your dog will be able to sniff out anything you train him or her to find.
3-5 years is the norm depending on the trainability of the dog. Usualy the dog would be obtain Shutzenhund titles 1, 2 and 3 then obtain tracking and/or Police dog endorsement. If you are interested in your dog learning advanced obedience and protection skills, I would recommend that you join a Shutzenhund club in your area as a good place to start.
Until it is determined that they are thoroughly trained to do their duties AND are under the complete control of ther handlers.
It can take up to 2 hours, if done correctly that is.
Hi! It can depend on the breed of the dog. However, for the most part, the training starts when they are 6 weeks old and continues throughout their career. Each dog is trained usually 15 months to 3 years by the time they are assigned to a handler.
It really depends on what exactly you want them trained for, but some dogs are able to be fielded in three years' time.
The average police dog is trained for a span of several years. However, the exact amount of time depends on what the dog's job is and what breed of dog it is.
The exact requirements for a police dog's training will differ from place to place and on the type of work the dog is trained to do, for example, whether a dog will be used to assist in criminal apprehension or will primarily be used for detection. However, most police dogs begin training at about one year old. The basic full time training program can be as little as six to eight weeks, depending on the dog and its ability. Weekly training sessions typically follow so long as the dog is in service, which can be up to 8 or 9 years.

The wolf might win the dog, but the officer will kill it with its pistol.