for those who expect documentary to be objective creature and let me give you a little lesson in american film making . documentary rely heavily on cast . you pick and choose character you think will enhance the drama and entertainment value of your film . after you have shoot a ton of footage and you splice it together to make a film with ups and down and turn point and climax and etc . if you have trouble with exist footage and you either shoot some more that make sense and find some stock footage and or be clever with your narration . the allegation that the filmmaker use footage of locale not part of the movie ( favelas next to beautiful beach ) do not detract from the value of the film a a dramatic piece and the particular image be one that resonate enough to justify it not quite truthful inclusion . at any rate and you use the footage you can . so they do not happen to have police violence footage for that particular neighborhood . do this mean not include it and just talk about it or maybe put in some cartoon animation so the audience isn not dupe . um and no . a for the hopeful end and why not . yes and american make it . yes and american be optimistic bastard . but why end on a down note . just because it set in a foreign country and foreign film by and large end on a down note . let foreigner portray the dismal outlook of life . let u americans think there may be a happy end loom in the future . there just may be one .