Since you have a police background I am gonna go this route :
Did you get any training in how to negotiate or work with people on the street or anything.. people who likely don't want to deal with you at all?
What or how did they train you to work with people who don't want to cooperate with you? I suspect they offer some sort of training on this sorta thing nowadays.
That may help you understand this a bit better. I doubt they tell you to strongarm people into working with you... unless they get violent I believe you have to keep negotiating right?
Allan A,
Do you have any references for the example your talking about. IE: working with people who definately don't want to work with you but making inroads due to negotation.