“…Drug use also has been found to significantly impair young men's ability to mature out of delinquency (Welte, Barnes, Hoffman, Wieczorek, & Zhang, 2005; Zhang, Welte & Wieczorek, 2002). For example, among a sample of young delinquent men, alcohol dependence and negative consequences of drug use were found to be associated with a more rapid increase in criminal activity (Welte et al, 2005). Moreover, studies involving drug treatment clients have demonstrated that reduced drug use is associated with reduced posttreatment criminal activities (Anglin & Perrochet, 1998; Farabee, Shen, Hser, Grella, & Anglin, 2001; Federal Bureau of Prisons, 1998; Fletcher, Tims, & Brown, 1997), further supporting the link between drug use severity and criminal conduct.…”