This dataset presents information on the relationship between drug and alcohol use and contacts with police for persons in Racine, Wisconsin, born in 1955. The collection is part of an ongoing longitudinal study of three Racine, Wisconsin, birth cohorts: those born in 1942, 1949, and 1955. Only those born in 1955 were considered to have potential for substantial contact with drugs, and thus only the younger cohort was targeted for this collection. Data were gathered for ages 6 to 33 for the cohort members. The file contains information on the most serious offense during the juvenile and adult periods, the number of police contacts grouped by age of the cohort member, seriousness of the reason for police contact, drugs involved in the incident, the reason police gave for the person having the drugs, the reason police gave for the contact, and the neighborhood in which the juvenile was socialized. Other variables include length of residence in Racine of the cohort member, and demographic information including age, sex, and race.