Based on data from: Alexia D. Cooper, Erica L. Smith, Bureau of Justice Statistics (2011-11-16). Homicide Trends in the United States, 1980-2008. NCJ 236018. Pages 21-22. https://www.bjs.gov/index.cfm?ty=pbdetail&iid=2221 archived at https://web.archive.org/web/20180330165915/https://www.bjs.gov/index.cfm?ty=pbdetail&iid=2221 Data in this chart appears in the file htus8008f30.csv included in the “Spreadsheets” link from that web page, which internally lists “Data source: Supplementary Homicide Report.”

The accompanying text reads:

 Family homicide

 Family homicides most often involved spouses or ex-spouses

  ▪ Homicides by a spouse or ex-spouse were an increasingly smaller proportion of all family homicides from 1980 through 2008. In 1980, they made up half (52%) of all family homicides. By 2008, they accounted for just over a third (37%) (figure 30).   ▪ Children killed by their parents were the second most frequent type of family homicide. These homicides increased from 15% of all family homicides in 1980 to 25% of all family homicides in 2008.   ▪ Parents killed by one of their children have been an increasing proportion of family homicides, rising steadily from 9.7% of all family homicides in 1980 to 13% in 2008.

 The proportion of family homicides that involved a spouse has decreased for both blacks and whites

  ▪ Murders of children by a parent accounted for an increasing percentage of family homicides, regardless of race.   ▪ In 1980, 16.1% of white family homicides and 13.4% of black family homicides involved a parent who murdered a child.   ▪ By 2008, 23.5% of white family homicides and 30% of black family homicides involved a child killed by a parent (figures 31a and 31b).

 Fathers were more likely than mothers to be killed by their children

  ▪ Teenage sons (16 to 19 years-old) were most often the perpetrators in parental killings (figures 32a and 32b).

 Brothers were more likely than sisters to be killed by a sibling

  ▪ About half of brothers who killed their own brother were between 16 and 30 years-old (figure 33a). Relatively few sisters killed their own brother.   ▪ Sisters killed by a sibling were more likely to be murdered by a brother than a sister (figure 33b). A quarter of all murders of sisters by a sibling were committed by a teenage sibling between 13 and 18 years-old.