This I know: Officer Hall is lying through his crooked teeth about what happened. The other Cookesville officer's statement was similiar to Hall's. The THP officers were busy with the Smoaks and probably didn't see very much. Three seconds is not very long, after all.
I hope the Smoaks' lawyer gets better video analysts than the media's. The press claims Hall was backing up because the dog approached him, but the video shows Hall moving sideways and back the instant the dog left the car. The dog wasn't approaching Hall when Hall moved backward; the dog was running straight ahead. He is lying. Everything Hall says the dog was doing to him was what Hall himself was doing to the dog.
I do hope you're right about the spotlight. I'd like to know what eventually pans out. I'd also like to know the circumstances of Hall's other dog killings, but don't have time to dig out the facts.
When the dog left the car Hall is backing up while the dog is not headed towards him like you said. Then they both go out of view. When they come back in view Hall is backing up and the dog is moving quickly towards him. Then he shoots point blank as he is backing up and the dog is headed straight at him. He is not lying about that.