During a 12-month period, seven gang members were seen in group therapy, where their psychological patterns were compared with a control group of program referrals who were not gang members. The gang members and control group were matched for age, race, and referral charge. The Jesness Inventory (which classifies disturbed children and adolescents) was used with its 11 scales, of which the most important were value orientation, manifest aggression, withdrawal, and social anxiety. To evaluate female trends in violent, traditionally male crimes, data from Prince George's County Juvenile Court (Maryland) were used. From the Jesness data, the female gang member emerges as person with a marked distrust for authority, a tendency to blame others for her problems, and a generalized disposition to resolve problems in ways that show a disregard for social customs and rules. She tends to react readily with emotion, seeks thrills, and is involved in the toughness ethic. The court statistics reveal an overall lessening of the differences between males and females in the frequency and type of charges. While the number of charges increased dramatically during the period from 1967 to 1974, females were accounting for greater percentage of these charges. While there has been no general trend in the number of violent or traditionally male charges over the years, the females have consistently accounted for a greater percentage of these charges. With the change in sex roles and sex role socialization occurring, it is reasonable to expect increasing similarity between male and female behavior, even in delinquent behavior. Thus, attention must be turned to developing adequate treatment and intervention programs for youth, both male and female, who engage in malicious behavior. Four references and one footnote are provided.