Unexpectedly Intriguing!
03 March 2011

We were digging into U.S. homicide data when we stumbled across some interesting statistics. The U.S. Department of Justice breaks down the number of homicides each year by both the race of the offenders as well as the race of the victims, at least for homicide cases where there's just a single offender and a single victim.

Since the data is only presented in table form, we thought it might make for a good data visualization project. Our first chart shows the number of victims, with the individual data points in each stacked column indicating the number of victims that were attributed to the indicated offender race category in 2008, the most recent year for which data has been posted at this writing. We should note that these homicides, with a single victim and a single offender, represent about 48.5% of the total number of homicides reported in the U.S. in 2008.

Number of U.S. Homicide Victims by Race of Victim and Race of Offender, 2008

In reading the chart above, the total number of victims for each racial group is identified in the column heading at the bottom of the chart, while the total number of offenders for each racial group is identified in the data legend. These latter values are the sum of the data values for each victim racial category.

Next, we calculated the percentage of victims whose homicides were attributed to offenders of the indicated racial category, generating the chart below.

Percentage of U.S. Homicide Victims by Race of Victim and Race of Offender, 2008

What we find is that in homicide cases where there's just a single victim whose murder may be attributed to a single offender, the victim racial's category is the same as that of the offender. In 2008, that means that 83.3% of murdered white victims were killed by white offenders, while 90% of black murder victims were killed by black offenders.

The same pattern is seen for homicide victims of other races, who were predominantly killed by offenders whose race was also categorized as "other," meaning their race was identified as being neither white nor black.

The pattern only breaks down when we get to the situation where the race of the victim has not been identified, where the offenders appear to be nearly equally split among the white, black and unknown racial categories. Here, homicide victims whose race is categorized as "other" accounts for very few of the murders where the victim's race has not been identified.

What that means however is that homicide victims are much, much more likely to have been killed by offenders of the same racial category than they are to have been killed by individuals of other racial categories.

Data Source

U.S. Department of Justice. 2008 Crime in the United States. Expanded Homicide Data Table 6. Race and Sex of Victim by Race and Sex of Offender, 2008. [Single victim/single offender].

Labels: , ,

About Political Calculations

Welcome to the blogosphere's toolchest! Here, unlike other blogs dedicated to analyzing current events, we create easy-to-use, simple tools to do the math related to them so you can get in on the action too! If you would like to learn more about these tools, or if you would like to contribute ideas to develop for this blog, please e-mail us at:

ironman at politicalcalculations

Thanks in advance!

Recent Posts

Indices, Futures, and Bonds

Closing values for previous trading day.

Most Popular Posts
Quick Index

Site Data

This site is primarily powered by:

This page is powered by Blogger. Isn't yours?

CSS Validation

Valid CSS!

RSS Site Feed

AddThis Feed Button


The tools on this site are built using JavaScript. If you would like to learn more, one of the best free resources on the web is available at W3Schools.com.

Other Cool Resources

Blog Roll

Market Links

Useful Election Data
Charities We Support
Shopping Guides
Recommended Reading
Recently Shopped

Seeking Alpha Certified

Legal Disclaimer

Materials on this website are published by Political Calculations to provide visitors with free information and insights regarding the incentives created by the laws and policies described. However, this website is not designed for the purpose of providing legal, medical or financial advice to individuals. Visitors should not rely upon information on this website as a substitute for personal legal, medical or financial advice. While we make every effort to provide accurate website information, laws can change and inaccuracies happen despite our best efforts. If you have an individual problem, you should seek advice from a licensed professional in your state, i.e., by a competent authority with specialized knowledge who can apply it to the particular circumstances of your case.