He is saying that the arrest was racially motivated. Based on the information in the article, I would agree. Yet another situation where people don't believe that a black man can live in a nice neighborhood or own a nice home. And I seriously wonder why this neighbor who called the cops didn't even recognize or know her own neighbor. I hope he pushes this further.
http://www.nytimes.com/2009/07/21/us/21gates.html