Re: Advice on Working K9 and family dogs.
I'm assuming you're already a police officer, since you are applying for the K9 Unit. Training collars vary by trainer. I don't use a prong during any detector type training. I'm surprised at your comments on socialization. The best police service dogs (PSD's) are in fact, very socialized dogs. The more exposure they have to people, places and things means less problems when they encounter these same things in real life situations. Any good working dog should concentrate on work, not another animal.
As far as kenneling arrangements, that often times depends on the dog, the handler and the family, if there is one, that is involved. Some of our dogs are kenneled when not working, some live in the homes. Either is perfectly ok. As far as experiences with these types of animals and training, I'm the Chief Trainer and program manager for a 45 dog police K9 unit.