On a sun-blasted Tuesday morning in the last weeks of 2008, four people pedal camouflage-painted bikes toward NW 61st Street and 13th Place, one of the busiest intersections for Liberty City's booming drug trade. Donald Vamper, a jovial 46-year-old wearing a camo bandanna Tupac-style; his cornrow-tressed wife, Sylvia; and Chris and Ezekiel Robinson, two scrawny 20-something brothers, wear green uniform shirts adorned with military stripes. They move at a leisurely pace in a loose approximation of the stealth formation — all equidistant from one another, two on each side of the... More >>>