I do believe that there are African Americans who have thick accents. My mom has a thick accent; my relatives have thick accents. But sometimes you have to adjust when you go into the world of film, TV, theatre, in order to make it accessible to people.
Genes are not simple triggers. No one is hardwired to commit murder or any other crime. Our actions are always the result of stupendously complex gene-environment interactions, and environment is likely to remain the more important influence by far.

