I would say that Guardians charts were incredibly misleading as they only told one half the story, this gives an incredibly distorted outlook on law enforcement in america. Its either incredibly stupid or deliberate(more likely), either way all this does is increase the anti police sentiment and makes the problem worse, bravo Guardian.....bravo.......
While it's certainly not free of bias, this article provides an interesting alternative perspective:
http://www.dailywire.com/news/7264/5-statistics-you-need-know-about-cops-killing-aaron-bandler