Figure 4 (Law Enforcement Officers Feloniously Killed and Assaulted, Percent Distribution by Circumstance at Scene of Incident, 2003-2012):  This figure contains two pie charts that show the percent distribution by the circumstance at the scene of the incidents in which law enforcement officers were feloniously killed or assaulted from 2003 through 2012. One pie chart furnishes the percentage of victim officers who were assaulted; another pie chart shows a breakdown by circumstance of the percentage of victim officers who were feloniously killed. (Based on Table 19.)