I know the stats....and I also know that there were more officer deaths per year in my first decade as a police officer than there are now.  There are many instances wherein the officer HIMSELF screwed up and was subsequently killed (the EPD motor officer shot on I105 @ 52nd comes to mind, as does the recent Texas Tech officer killed in the past several days.)  In fact, former EPD Chief Pierce Brooks wrote a book about the "10 deadly errors" committed by officers that get them killed.  I would submit that ONE officer murder is one too many.  And you might want to get stats from the FBI/NCI records than WApo....LOL