Commentary: Update on assessing risk for violence among stalkers.

Thirteen years after its introduction as a prosecutable crime, stalking remains a public concern. Each year in the United States, approximately 1 million women and 371,000 men are stalked. Research and clinical practice have revealed that some cases of stalking are associated with high rates of violence. The need for research on these violent offenders is critical. The following article is an overview of the history of stalking research, a review of significant research findings, and a review of what is not known.