Watching the live-streamed footage from Ferguson, Missouri last summer, the tear-gassed streets and flaming buildings looked more like the images we're used to seeing from the Middle Eastern wars than anything in the US. Due to a string of shootings and violently controlled protests like those in Ferguson over the last few years, the militarization of America's police force has become a widely discussed and controversial issue. 

A new documentary by Scott Chistopherson and Brad Barber traces the proliferation of military gear and a military mentality in the nation's police force. 

Peace Officer follows Utah politician Dub Lawrence, who helped found the state's first SWAT team in 1975, and whose stepson was eventually killed by a SWAT team in 2008. The film will be in theaters September 13th.