No one is ever “forced” to hire a murderer. Ever. Your statement to that effect was stupid.
Obviously the killer is going to become aware of you ~ you could be an aggrieved child, an angry brother, a widowed wife, and there you have the puke who killed your son, wife, brother, father or whatever, and he'll be on the lookout. In fact, he'll probably have already gotten a prohibitory order on you.
So, how do you get close enough to this guy to exact revenge, or re-balance the scales of justice, or retrieve honor?
Well, you don't have many choices there do you once the government has decided to protect the killer.
I would say you have been FORCED to use a hired killer from somewhere else ~ simply because he's probably not only more experienced, he'll probably be able to get much closer to your target than you are.
FORCE is the correct word.
NOTHING should be prohibited from being subject to a lawsuit in court. That simply puts us back a couple of notches into a state of nature and at that point hunting rules prevail. Bringing in a sharpshooter from out of town is always acceptable under those rules.