In the last three decades, researchers of the relationship between race and crime in North America have broadened their focus beyond differences between blacks and whites to include other groups: for example, studies of Hispanics and Asians are increasingly common. However, one group is continually underrepresented in studies of crime and, particularly, studies of violence: American Indians, or, as they are known in Canada, Aboriginals. In the preamble to her groundbreaking study of violence among American Indians, Bachman (1992) notes that prior to her work, multivariate studies of causes of Aboriginal violence were virtually nonexistent. Four years later, Nielsen and Silverman (1996: xii) found little had changed since Bachman's research. They remark that,

This oversight is surprising. Although Native peoples represent a small proportion of American and Canadian populations, they are consistently overrepresented in these nations' arrest and incarceration statistics. For example, Silverman (1996) estimates that in the period between 1987 and 1992, less than 1 percent of the U.S. population was American Indian; however, in these years the arrest rate for violent crime among American Indians was approximately 50 percent higher than for white Americans; for homicide, it was about 70 percent larger (see also Bachman, 1992; LaFree, 1995; Snyder-Joy, 1995).