http://www.youtube.com/watch?v=EPGx1icFdLQ
John Baugh discusses linguistic profiling (see also: http://www.youtube.com/watch?v=3KCL97s1lJg).
[youtube]https://youtu.be/3KCL97s1lJg[/youtube]It also discusses the creolist theory of the origins of African American English.
Around 5:00, the video shows people speaking Gullah.