When Men Murder Women is an annual report prepared by the Violence Policy Center detailing the reality of homicides committed by males against females in single victim/single offender incidents. The study analyzes the most recent Supplementary Homicide Report (SHR) data submitted to the Federal Bureau of Investigation. This study uses 2017 data, the most recent year for which information is available. This year's report found that nationwide, 92 percent of women killed by men were murdered by someone they knew, and that the most common weapon used was a gun.