I can't see how the life of this animal is more valuable than any other roebuck. In a wild where there were wolves it would be one of the first to be taken, because nature abhors a 'sport' and that is what off-coloured animals are.
Taking it into a game-park is different, but in the wild it is likely to be low in the pecking-order, as many odd-coloured animals are, and perhaps not live a happy life.

I'm no longer a hunter, but I was, and I fish. It has been 50 years since I killed for anything but food. Never was a trophy hunter, why kill the best there is?