We report the results of a study of substance use, measured by self-re
ports and hair test results, and delinquency among arrested youths ent
ering a service intervention program. The results highlight important
relationships between their alcohol and other drug use and involvement
in delinquency in the year prior to their interviews. The research an
d service implications of these findings are discussed. [Article copie
s available for a fee from The Haworth Document Delivery Service: 1-80
0-342-9678.].