Unlike the north, the medieval Tamil kingdoms, which included most of the south, never came under the sway of Muslim conquerers who dealt a blow to Aryan supremacy.

CNN: Center Cut

Sheriff's investigators said Matthews and all four suspects have ties to the white supremacy group Aryan Nations.

WSJ: Final free suspect believed to be in NY state

The murder has also shed light on the fact that state prisons in Texas and across the South have become purveyors of white supremacy, recruiting susceptible men into violent gangs such as the Aryan Brotherhood.

ECONOMIST: Race relations