In an article titled "Online Advertising's Racism Mess," [1] Salon.com's Andrew Leonard's piece asks this question in a subheadline:
"Why does Google's ad network think people with names like Latanya and Rasheed have an arrest record?"
As they say, to ask the question is to answer it.
Links:
[1] http://www.salon.com/2013/02/04/online_advertisings_racism_mess/