This study used data from the homicides in Chicago 1965-1995 dataset (N=9,340) to examine the relationship between the use of certain types of weapons in criminal homicides by gender, race, age, victim-offender relationship, motive, location, and changes over time. Differential association and sex-role theory were utilized to argue why gender differences would occur in type of weapon used in a homicide. Subculture of violence theory was used to emphasize that the place where the homicide occurs, the relationship between the victim and offender, motive of the offender, and the remaining variables affects the type of weapon used to kill. Significant relationships were found for all bivariate analyses performed. The type of weapon used to kill differs most by sex of offender, resulting in a moderately strong association. The type of weapon used to kill differs least by age of offender and although statistically significant, the association between the two is very weak.

This study examines the impact of white ethnic concentration on robbery and homicide in Chicago and New York City. As one of the first to disaggregate white ethnic populations, this study has the expectation that Italian-American concentration will have a stronger influence on robbery and homicide than any other white ethnic concentrations. This study is founded on prior qualitative research suggesting that the reputation of Italian-Americans influences the behavior of outsiders in their communities. The data show there is a significant and negative relationship between Italian-American concentration and the violent crimes robbery and homicide. This relationship only exists for white ethnic concentration with robbery. These patterns occur across both cities at three different aggregate levels. The results indicate that there may be particular characteristics about Italian-American ethnic concentrations which have dampening effects on the frequency of homicide and robbery in their communities; it is speculated that a reputation for Mafia involvement is one of the protective factors.