In 1997, I was one of the prosecutors in a court case that used race-based testimony to sentence to death Duane Buck, who's black.
At the time, I was an Assistant District Attorney in Harris County, Texas and Mr. Buck was being tried for murder. During the trial, an "expert" witness named Dr. Walter Quijano was permitted to testify that being black increases the likelihood of 'future dangerousness'. That testimony in part led to the jury sentencing Mr. Buck to death.
Three years after Mr. Buck's trial, the Texas Attorney General actually promised that he'd get a new, fair sentencing hearing. This was along with six other men who were sentenced unfairly because of similar testimonies in their own trials. Those six other men have received their hearings, but not Mr. Buck.