Victims of sexual violence who are incarcerated are most likely to be assaulted by jail or prison staff. Sexual violence is notoriously difficult to measure, and there is no single source of data that provides a complete picture of the crime. Based on those interviews, the study provides estimates of the total number of crimes, including those that were not reported to police. While NCVS has a number of limitations most importantly, children under age 12 are not include overall, it is the most reliable source of crime statistics in the U. We have also relied on other Justice Department studies, as well as data from the Department of Health and Human Services and other government and academic sources. When assembling these statistics, we have generally retained the wording used by the authors.