There are many reasons that community activists have supplied. Here is a one from a New Yorker:
Andrew Padilla is disturbed “that all this energy towards accountability…can be flipped into increased surveillance in communities of color and increased budgets to police.” The body cameras point at civilians, giving the police’s perspective of the interaction. In many videos released from officer body cameras, the police officer has their gun drawn but it cannot be seen in the shot. “Body cameras on police [are] fundamentally the opposite of cop watch,” Andrew Padilla argued. “Body cameras on police…record civilians. In cop watch, you record police.”Another investigation found...
One key problem: officers control the record button. They decide when to turn on and off the cameras and have little to fear when violating department policies about recording, Fusion’s analysis found. In many use of force incidents, camera footage doesn’t exist, is only partially available, or can’t be found. And when body cameras are turned on, the footage usually favors the officer’s account, according to police, law enforcement experts and public defenders we spoke with.
