I assume that you are referring to the article in the SeattleTimes.com link below.
The basic argument of this article is that police around the country are more likely to pull black or brown people over without having a good reason to do so. It argues that white people are generally not treated in this way by law enforcement.
Your response to this ought to revolve around analysis of the statistics presented. You need to discuss whether those statistics actually do prove racial profiling. You also need to discuss whether there could be other reasons for the differences that are revealed in the statistics. For example, you need to look at the fact that blacks are searched at a rate almost three times that of whites and ask if that proves profiling is happening or if there is some other way to explain why that happens.