The article presents gang membership in a life-course perspective among juvenile and young adult gang members. The main idea is to study criminal careers from youth to an early adult periods of life. The study methods are based on nine annual studies from the National Longitudinal Survey of Youth 1997. This specific study focuses on the growth curve and trajectories of gangs. The study presents variability in the pathways in and out of gangs, and the factors which influence these pathways. The results show that a typical gang career lasts two years of less. Gang membership also depends on the age of youngsters.
