In 1984, Index crime offenses declined by 7 percent from 1983, representing the third year of decline. Adult arrests increased slightly in 1984, while juvenile arrests declined, with the total number of arrests declining each year since 1981. This decrease was attributable to declines in robbery, burglary, and larceny; aggravated assault and motor vehicle theft increased over this period. A dramatic increase in juvenile and adult drug arrests was found between 1980 and 1984. Adult criminal prosecutions increased between 1983 and 1984, particularly those for felony drug offenses. Adult felony convictions, particularly drug felonies, increased, while misdemeanor convictions decreased. Juvenile convictions increased 8 percent in 1984. The District's incarceration rate is among the highest in the Nation, with a daily prison population of 7,108 in 1984. The population has increased 58 percent since 1978. In 1984, parole releases declined and revocations increased. Definitions and additional statistical data are appended. 15 tables.