They'd have to be able to blend in perfectly, and not just that but be able to locate the bloody kooks responsible for the guy's abduction. The first is extremely difficult (if at all possible), and the second is not any easier. All that can be hoped for is that these bounty crew gets as many of the bad guys as possible, and more importantly does not get in the way of our military.
I have deep doubts on their ability to do ANY of the above. But I do hope they do some good (and stay out of the military's hair).