Arlington County ex-firefighter charged with Jan. 6 police assault

It seems you are mentioning a recent news headline. However, as an AI, I don’t have the ability to access real-time news directly. As of my last available update, I don’t have the specific details about the case of an Arlington County ex-firefighter charged with a January 6 police assault. For the latest and detailed information, I recommend checking the recent news updates from a reliable source.