What does it matter why he was being arrested? Once he is in the process of complying and surrendering with his hands up there is no reason to unleash a dog attack on him. The other officers clearly knew this wasn’t the right thing to do by their statements and reactions in the video.
We need police, but we absolutely cannot try to justify police when they behave badly. They are paid public servants who MUST be held to a higher standard than the average person and the average person would, in all likelihood, be charged with a felony if they were on video siccing a dog on someone who was no longer a threat. It does not help the cause of law and order to protect bad police officers. Way too much is done to protect bad officers and that lends credibility to attacks on all police.
BTW, the only thing the truck driver was charged with was Failure to Comply. I suspect that given the circumstances they would throw the book at him with every charge they could think of in order to justify the actions with the dog. They didn’t charge him with anything more than failing pulling over and to me that says something.
LOL. The reality is, they are held to a LOWER standard than ordinary citizens who don't wear magical blue suits. The mere fact that the phrase "qualified immunity" now exists as a legal concept is absolute proof of same.