Well, Here is my take on the situation..........
They prob. got stopped because their vehicle matched the discription of the Armed Robbery suspect.
You notice the article did not mention what type of dog it was. I have a 55lb Pit Bull, and he is a med. size dog. And often wags his tale when he's pissed.
It's hard to second guess what the officer did, because there was no account from the officer in the news story. And usually the media tends to leave out some important details. I'm not saying the officer was just in what he did. But I will say, it smells fishy.....I think there is more to the story than what that family is actually telling.
In the story it tells of the police dept and the Highway patrol being involved. If the Police Officer was wrong in shooting the dog, it will come out.
It just seams there is more to that story.