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Unclassified <br />Law Enforcement/Security <br />Personnel Casualties <br />Law enforcement suffered casualties in 21 (46.7%) of the 45 incidents where they engaged <br />the shooter to end the threat. This resulted in 9 officers killed (4 of whom were ambushed in <br />a shooting) and 28 wounded. <br />In 3 (1.9%) of the 160 incidents, armed, non -sworn security personnel were killed. 21 In 2 <br />additional incidents, 2 unarmed security officers were killed and 2 were wounded." <br />Shooter Outcomes <br />In all, 64 (40.0%) of the shooters ultimately committed suicide. Most shooters were males <br />acting alone. Only 2 (1.3%) of the 160 incidents had more than 1 shooter and only 6 (3.8%) <br />involved a female shooter. Of note, 2 of the 12 shootings at institutions of higher education <br />(IHEs) were perpetrated by females. At least 5 shooters were at large at the time of the <br />21 <br />publication of this study. <br />of the 45 <br />Results showed 3 shooters carried improvised explosive devices (IEDs); 1 shooter used the <br />device (a Molotov cocktail).29 And, 1 shooter booby -trapped his residence with IEDs "At <br />Incidents <br />least 6 shooters wore or were carrying body armor. <br />(46,7%) <br />required law <br />Locations <br />enforcement <br />The FBI identified 11 separate incident location categories't when seeking to identify the <br />to engage <br />primary locations where the public was most at risk during an incident. These location <br />categories include commercial areas (divided into malls, businesses open to pedestrian <br />the shooter, <br />traffic, and businesses closed to pedestrian traffic), educational environments (divided into <br />resulting in <br />schools [pre -kindergarten through 12th grade] and IHEs), open spaces, government proper- <br />9 officers <br />ties (divided into military and other government properties), residences, houses of worship, <br />and health care facilities. <br />killed and 28 <br />wounded. <br />When an incident occurred in two or more locations, the FBI sought to identify where <br />the public was most at risk. For example, in instances where casualties occurred inside a <br />private residence before a shooter moved to a public area, those incidents were catego- <br />rized at the location where the public was more at risk. In addition, some specialized <br />business locations (i.e., malls and health care facilities) were identified separately to <br />provide added transparency. <br />In all, 24 (15.0%) of the 160 incidents involved shootings at more than one location. This <br />supports the value in quickly assessing the circumstances where the first shooting occurs <br />and may aid law enforcement's ability to predict other potential targets. <br />27 United States HDI oraustMemo rial Museum, June 10,2009; Lloyd D. George U.S.Courthouse and Federal Building,January 4, 2010; Washington Navy <br />Yard Building 197, September 16, 2013.(SeeAppendix A. <br />28 Red Lake High School, March 21,2005; Los Angeles International Airport November 1, 2013. <br />29 Arapahoe High School, December 13, 2013. <br />30 Clnemark Century 16, Aurora, Colorado, July 20, 2012, <br />31 See Appendix C for a summary of location definitions. <br />Unclassified 12 <br />