Do you think body cameras on policemen will reduce police brutality?

Black lives matter. Of course, all lives matter but unarmed young Black men are being killed disproportionately to whites. I don’t have the citation but my minster said that 14 unarmed Black men have been killed since Ferguson. A national conversation and some major protests have been going on after the Ferguson and Garner grand juries refused to indict. We don’t know all the facts in Ferguson but the Garner murder was caught on video. Body cameras for policemen are being talked about as a solution. Will they help or be ineffectual? Your thoughts?

(I will refrain from jumping in with comments because I want to hear others’ opinions unless I feel it is necessary.)