▁per tain ▁to ▁their ▁own ▁regions . ▁ ▁In ▁one ▁of ▁his ▁gang ▁control ▁options , ▁he ▁demonstr ates ▁it ▁in ▁a ▁table . ▁ ▁On ▁the ▁left ▁hand ▁side , ▁there ▁are ▁prevent ion , ▁inter vention , ▁and ▁supp ression . ▁These ▁are ▁strateg ies ▁for ▁gang ▁control ▁policies . ▁" Pre vention " ▁refers ▁to ▁stop ▁people ▁from ▁being ▁in ▁a ▁gang ▁before hand . ▁" Inter vention " ▁refers ▁to ▁come ▁in ▁between ▁the ▁people ▁who ▁are ▁already ▁in ▁gang s ▁and ▁attempting ▁to ▁dis eng age ▁them ▁from ▁the ▁group ▁or ▁reduce ▁their ▁association ▁with ▁the ▁gang . ▁" Supp ression " ▁refers ▁to ▁stopping ▁the ▁ill ic it ▁activities ▁of ▁gang s . ▁This ▁concept ▁usually ▁points ▁to ▁law ▁enfor cement , ▁arr ests , ▁police , ▁courts , ▁correction ▁facilities , ▁and ▁many ▁others . ▁On ▁the ▁top ▁are ▁issues ▁that ▁are ▁present ▁in ▁gang ▁control ▁policies ▁and ▁what ▁it ▁looks ▁like ▁in ▁an ▁ideal ▁policy . ▁" Target ing " ▁is ▁the ▁correct ▁identification ▁of ▁people ▁who ▁are ▁in ▁gang s , ▁whether ▁they ▁are ▁prepar ing ▁to ▁join ▁or ▁already ▁joining . ▁This ▁principle ▁heavily ▁re lies ▁on ▁a ▁person ' s ▁knowledge ▁of ▁what ▁a ▁gang ▁really ▁is , ▁its ▁structure , ▁organization , ▁activities , ▁effects ▁throughout ▁the ▁years , ▁history , ▁and ▁much ▁more . ▁" Group ▁Process " ▁refers ▁to ▁the ▁idea ▁that ▁" gang s ▁are ▁groups ." ▁Klein ▁bel ieves ▁that ▁policy ▁mak ers ▁must ▁remember ▁that ▁membership