“…Other studies, which followed participants from youth through adulthood (Andersson et al, 2012;Bersani et al, 2009;D'Unger et al, 1998D'Unger et al, , 2002Eggleston et al, 2004;Huesmann et al, 2009;Jones et al, 2001;Kreuter & Muthén, 2008;Laub et al, 1998;Nagin et al, 1995;Piquero, Farrington, et al, 2010;Sampson & Laub, 2003) had at least one, and in many cases more than one, group of life-course persistent offenders. Teacher-rated disruptive behaviors SAS 820 girls from Quebec followed for 10 years (1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996) 4 Low (57.4%) Medium (31.6%) Medium-High (9.6%) High (1.4%) Coté et al, 2002aCoté et al, , 2002b Teacher-rated impulsivity SAS 1,865 boys and girls in Quebec followed from kindergarten through grade six Freiburger et al, 2012;Tewksbury & Jennings, 2010;Tewksbury et al, 2012; Homicide perpetrators only: Vaughn et al, 2009;Burglars only: Vaughn et al, 2008;Drug users only: Vaughn et al, 2012;African Americans only: Higgins, Bush, et al, 2010;Higgins et al, 2012;Hispanics only: Maldonado-Molina et al, 2009;Maldonado-Molina, Reingle, et al, 2010;Reingle et al, 2011;Parochial school students: Lynne-Landsman et al, 2011);and geographical location (Andersson et al, 2012;Bersani et al, 2009;…”