This act, he explained in a recent interview, could allow defendants to introduce evidence to argue that their prosecutions or sentences were influenced by race.
Watkins has already built a reputation for using DNA tests to free wrongfully convicted inmates.
In Dallas County, 28 of the 33 people who have been exonerated of crimes since 2001 are black, according to a spokeswoman for the DA's office.
According to Watkins, "I would imagine that there are individuals, not just in prison, but particularly on death row, that were convicted because of the color of their skin ...The issue that we're bringing to light is to make sure that everything is fair, no matter what you look like, no matter where you come from, and you're treated just like anyone else.
"And if you deserve a death sentence, then you will get it. If you didn't, then you shouldn't be on death row."