Page 14 - Read Online
P. 14

Schmidt et al. J Surveill Secur Saf 2020;1:1-15  I  http://dx.doi.org/10.20517/jsss.2019.02                                                     Page 7














































               Figure 1. Graphic timeline of the incident and campus map (source: ref. [35] )

               (6) The university emergency plan did not include scenarios of a shooting and the assignment of a threat
               assessment team.
               (7) The university had insufficient security systems such as cameras in dormitories and entrances to
               buildings as well as locks on classrooms.


               3.2.3 Consequences
               Twenty-seven students and five teachers were killed, and 17 people wounded by 23-year-old Virginia Tech
               student Seung-Hui Cho [35,36] .


               3.2.4 FTA and RBD
               The FTA illustrated in Figure 2 identifies the direct causes and contributing factors leading to the Virginia
               Tech Shooting. The equivalent RBD is then cited in Figure 3, where every OR is series and every AND is
               parallel structure. The first direct cause defined is gunman Cho. Insufficient treatment, worsening mental
               health and a lacking supporting system were linked with an AND- gate to demonstrate their almost
               simultaneous occurrence. The insufficient treatment resulted from an inadequate evaluation of his mental
               health and lack of reporting. Another direct cause is linked to Cho’s ability to purchase the guns due to
               reporting failures about the unstable mental health of Cho and a gap in gun laws. The third direct cause
               relates to the university and its lack of internal communication, the misinterpretation of the mental health
               and education laws, as well as the overall insufficient evaluation of Cho’s situation. The contributing factors
               are linked with an AND-gate addressing the deficiency in responding to the incident and the lack of
   9   10   11   12   13   14   15   16   17   18   19