US Department of Justice, Bureau of Justice Statistics, Background Checks for Firearm Transfers, 2015 - Statistical Tables, by Jennifer C. Karberg, Ronald J. Frandsen, Joseph M. Durst, Trent D. Buskirk, and Allina D. Lee (Nov 2017), https://www.bjs.gov/content/pub/pdf/ bcft15st.pdf. Data for 2016 was obtained by Everytown from the FBI directly. Though majority of the transactions and denials reported by the FBI and BJS are associated with a firearm sale or transfer, a small number may be for concealed carry permits and other reasons not related to a sale or transfer., Everytown for Gun Safety, Online and Off the Record, October 2014, available at http://everytown.org/documents/2014/10/onlineand- off-the-record.pdf; Danger in the Land of Enchantment, Investigating Online Gun Sales in New Mexico, February 2017, available at https://everytownresearch.org/wp-content/uploads/2017/02/EGS-031-NewMexico_5a_020817.pdf; The Wild Wild Web, Investigating Online Gun Markets in Nevada, January 2016, available at https://everytownresearch.org/wp-content/uploads/2016/01/Nevada_Wild- WildWeb_073117_web.pdf, Everytown for Gun Safety, Online and Off the Record, October 2014, available at http://everytown.org/documents/2014/10/online-andoff- the-record.pdf, Rudolph, K. E., Stuart, E. A., Vernick, J. S., & Webster, D. W. 2015. Association between Connecticut’s permit-to-purchase handgun law and homicides. American journal of public health, 105(8), e49-e54., Crifasi CK., Meyers JS, Vernick JS, & Webster DW. 2015. Effects of changes in permit-to-purchase handgun laws in Connecticut and Missouri on suicide rates. Preventive Medicine. 2015(79):43–49., National Instant Criminal Background Check System (NICS) Operations 2016. Federal Bureau of Investigation (FBI). Available at. https://www.fbi.gov/file-repository/2016-nics-operations-report-final-5-3-2017.pdf/view, Quinnipiac University Poll, U.S. Support for Gun Control, National Poll, February 2018, available https://poll.qu.edu/national/release-detail? ReleaseID=2521, Everytown compared the rate of women killed with guns by current or former partners between 2010 and 2014 in states that did or did not require background checks for unlicensed handgun sales. Data were obtained from the FBI’s Supplementary Homicide Reports, Florida Department of Law Enforcement, and the US Census., Everytown compared the rate of law enforcement officers killed with guns that were not their own between 2011 and 2015 in states that did or did not require background checks for unlicensed handgun sales. Data on deaths were obtained from the FBI’s Law Enforcement Officers Killed and Assaulted database. Officers working in an official capacity (on or off duty), had full arrest powers, ordinarily worn or carried a badge and a firearm, and been paid from governmental funds specifically appropriated for law enforcement officers were included in the analysis. Population of law enforcement officers (“Police Protection - Persons with Power of Arrest”) were taken from the United States Census Bureau available at https://www.census.gov/govs/apes/., Everytown compared the rate of people who died by firearm suicide between 2011 and 2015 in states that did or did not require background checks for unlicensed handgun sales. Data were obtained from the Centers for Disease Control and Prevention’s Fatal Injury Reports in December 2016 and the US Census., Daniel W. Webster, Jon S. Vernick, and Maria T. Bulzacchelli, “Effects of State-Level Firearm Seller Accountability Policies on Firearm Trafficking,” Journal of Urban Health 86, no. 4 (July 2009): doi:10.1007/s11524-009-9351-x.