@Blizzard "Disagree" with your post above because everything about the pain-in-the-ass his sister, mom, etc are all non-factors. At the time, the officer did not know any of this.
Regarding the case, I've listened to enough lawyers to understand that in many cases a jury feels helpless. They want to convict a person of 'something', but following the strict rule-of-law that the judge spells out during instructions, the evidence often does not allow a conviction for the crime that the prosecutor went with.
In a case like this, I believe that the prosecutor is often pressured to "go for it" on a charge, knowing it is a long shot, and wishing they could get away with charging a lesser offense and be more likely to get a conviction on it. It's lose/lose for them, because if they don't charge a strong enough crime, the "outraged" will protest that he's being too easy on the cop. A shitty situation all around.