MCB Gang Leader is a character and merchant in Deus Ex: Human Revolution. He and two members of his gang are encountered in Highland Park, right after the arrival. Adam Jensen can ask him about the area, and buy a couple of items. He'll say that the area is currently occupied by unknown Spec Ops soldiers, later revealed to be part of Belltower Associates. His wares include a Target-Leading System upgrade for the crossbow and tranquilizer rifle, some ammunition, and a grenade pack consisting of one gas and EMP grenades.