State laws that require people under domestic violence-related restraining orders to turn in their firearms are associated with a 14 to 16 percent lower intimate partner firearm homicide rate.

April M. Zeoli et al., “Analysis of the Strength of Legal Firearms Restrictions for Perpetrators of Domestic Violence and Their Associations with Intimate Partner Homicide,” American Journal of Epidemiology 187, no. 11 (November 2018): 2365–71, https://doi.org/10.1093/aje/kwy174. See also: Carolina Diez et al., “State Intimate Partner Violence-Related Firearm Laws and Intimate Partner Homicide Rates in the United States, 1991 to 2015,” Annals of Internal Medicine 167, no. 8 (October 2017): 536–43, https://doi.org/10.7326/M16-2849