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David Gunn shows up on page 142 of Malcolm Gladwell's highly acclaimed The Tipping Point: How Little Things Can Make a Big Difference, published by Little, Brown and Company in 2000. That book fleshes out Gunn's approach to ridding the New York subways of crime in the 90s.
I will try to get back to this eventually to see if I can craft a paragraph that brings these elements into proper focus, unless someone else beats me to the punch; but either way, there are elements here that would certainly contribute to the narrative.
