Well, it would be evil to actually ask a question about someone's ethnicity; totally politically incorrect, don't you know? 

So 'guessing' is all a cop has left to meet this 'politically correct' requirement.

Let's just hope 'they' don't decide a cop has to 'guess' the difference between Korean, Chinese, Vietnamese, Laotian, Japanese, Indonesian or variations of all of the above!

I'm guessing this is more of a 'Black vs. White vs. Hispanic' requirement, though.  

That's where the lawsuits are.