He swerved to miss the box because it was to be used as evidence. Some guys had tried to ditch the drugs they had and threw them into the road. He wanted to save the evidence and lost control. It is not necessarily that he was speeding but he was answering a call fro help from another officer. So to all you who say he should have slowed down, how would you feel as a cop if your back up took their time to get to you? the one he was on the way to help could have been in danger for all you know.