This shows clear intent to deceive the public. THey weren't concerned about privacy before running over a crash victim. Without a camera, they would certainly have lied about this case, too. In fact, they told a different story until the camera video was requested. We can't be sure if it was because they truly didn't know the story or if they didn't know they couldn't suppress the video.
This is one of the most blatant abuses of government I have heard in a long time. If government truly believes that privacy counts more than video I suppose we won't be seeing those drones in the USA after all.