The irony in this is that more than half of all homicide victims are minorities. Apparently juries think that killing a person of color doesn't deserve maximum punishment nearly as much as killing a white person. Minorities have always been executed more often than whites. This is no new development. But the mentally incompetent are being executed more and more.
Most reasonable people agree that killing someone who is mentally ill is wrong.
It's like killing somebody because they have chicken pox. It's not right. But the public overwhelmingly supports the death penalty anyway. Numbers may not tell the whole story, but they never lie. The system is racially biased and unfair.