A cross-sectional study of 970 boys showed a significant relationship between LD and self-reported and official JD. Odds of being adjudicated were 220 percent greater for LD than for non-LD adolescents. Results also supported the school failure, the delinquency susceptibility, and the differential treatment theories for the LD-JD relationship. A longitudinal study of 351 official nondelinquents from the first study similarly showed an association between delinquent activities and juvenile justice system contacts and LD. In both studies, LD boys were not at greater risk for severer (institutional) adjudications. From 1977 to 1979, a remediation program was conducted to examine the value of diagnosing and treating LD as an aid to the rehabilitation of juvenile offenders. Program goals were to improve scholastic achievement, self-esteem, and attitudes toward school and to prevent delinquency. Approximately 400 adjudicated delinquents participated. Results indicate the program was effective in improving academic growth in both targeted areas of greatest deficiency and in overall achievement. While the effects of the program on self-reported and official delinquency were nonsignificant, significant effects were found for some subgroups. Further, this effect was direct, although improved school attitudes were related to decreased self-reported delinquency. Four case studies of handicapped delinquents are included. 42 references.