This brief examines 36,263 homicides in Chicago over a 53-year study
period, 1965 through 2017, at micro place grid cells of 150 by 150
meters. This study shows not only long-term historical patterns of
homicides in Chicago, but also places that historical context of
homicide in reference to the dramatic increases in homicides in
2016-2017. It uses several different inequality metrics, as well as
kernel density maps to demonstrate that homicides were more clustered in
the 1960's compared to later periods. Using zero inflated group-based
trajectory models, it demonstrates the long-term temporal stability of
homicides at micro places. This brief will be of interest to researchers
in policing, homicide, and research methods in criminology.