okay, so, people suggest this all the time. but look at the case of Eric Garner: we literally have undisputable video of police killing a man by taking actions explicitly prohibited by the police department, ignoring his pleas for assistance, and then neglecting to attempt resuscitation after he passes out and stops moving. and it doesn't even go to court. now how are body cameras, phone cameras, any cameras at all, gonna help a goddamn thing?2. Increased accountability for the actions of law enforcement.
Edit: somehow, the link starts at the begining of the video even if I changed the URL to skip the part irrelevant to the discussion... skip to 3:50 I agree with Dan Brown on this. Of course the officer should have been arrested but the problem does not lie with the camera but the whole system. And at the very least the fact that it was filmed shone a light on this (because now law enforcement can't just say that they got information that the public doesn't like they did in previous cases) and this will (hopefully) lead to more reforms to make the system better. Just because the camera footage didn't help in this case, doesn't mean we should reject cameras as part of the solution.