Complaint data (offenses known to have occurred) and arrest data conform to guidelines of the Federal Bureau of Investigation's Uniform Crime Reporting Committee and New York State's Division of Criminal Justice Services. Generally, in multiple offense situations, when several different reportable offenses are committed at the same time by the same person or persons, both complaint data and arrest data are reported against the most serious offense classified in the penal law. The crime index is comprised of murder, forcible rape, robbery, aggravated assault, burglary, larceny theft, and motor vehicle theft. Compared to 1988, the murder rate in New York City increased slightly in 1989, while robbery and motor vehicle theft rates rose substantially. The incidence of forcible rape, burglary, and larceny theft decreased. Arrest data are tabulated for felonies, misdemeanors, violations, and traffic infractions, as well as for gambling and drug offenses. Crime comparison statistics cover complaint and arrest data, summons data and activity, youth report data, and vehicular manslaughter.