It does sound bad with what the other officer is alleging happened. But about the expletives, that isn't that big of a deal as most would think. You have to realize the difference in social circumstances. When an officer is dealing with someone that is throwing out MF that, F you, suck my ****, then sometimes the only way to get their attention is get onto the same level as they are. A friend of mine once was explaining it to me once, when he had drawn his handgun on someone, that just saying "Freeze Police" isn't good enough for some, you have to make them realize you are prepared to shoot and a millisecond from putting a bullet into their brain. It's a way to establish dominance in a rather uncivilized situation.