The Supreme Court is back in session and two cases involving racial bias in criminal cases are on the docket. The justices heard arguments in a case on Wednesday where racial bias may have been a factor in sentencing a man to death. Duane Buck was convicted in 1996 of murdering two people and wounding another. His guilt is not being disputed, but his death sentence is. That’s because his own defense team hired an expert witness who testified that he was more likely to commit violent crimes in the future because he is black.