Okay, except for Minnesota (I believe), the rules are basically like this:
You can cross boarders (town, city, county, state, not sure about country) in pursuit for someone.
You can bust down doors all you want.
You can shot without asking.
You can't be a cop or any other enforcement officer working for (city, county, state, country).
This is the rules in Arizona.
Yes, most bounty hunters unless you are DAWG then you have another job.
I might be wrong, but I doubt it!