The last white man to join death row from Harris County was a convicted serial killer in 2004. Since then, 12 of the last 13 men newly condemned to die have been black, a Houston Chronicle  analysis of prison and prosecution records shows.
The latest death sentence was handed down in October to a Hispanic.
The role of race in capital punishment has emerged repeatedly this year in the unsuccessful appeals by Duane Buck , an African-American from Houston convicted in a double murder. His 1997 sentencing featured testimony from a former prison psychiatrist who claimed blacks are more dangerous than whites.