It blared background music to create a serious overtone, car alarms, police sirens, etc, while people are talking in the documentary. The editing looks as if it was completed in the 1970's with its outdated styles and soundtrack, rather than edited in 2010. (PS: Many clips are indeed old, such as the interviews. However things which should have been updated with new film, were not. It's as if a five year old pieced this together out of existing film for a school project)
The movie attempts to cover many shootings and the details of them all. Yet it glosses over the important details by filling up 90% of the video with commentary from postal workers, most of which are complaints regarding their bosses.
It also fails to mention some important details, such as the series of fights by McIlvane which led to his suspension, caring to talk about instead the fact that he was written up for improperly following trivial procedures. The movie shifts the blame onto the managers, rather than attempting to provide a holistic view of the situation.
The overall result is a poorly edited documentary, weak in its attempts to explain the mass shootings.