The solution, now that we have DNA to work with, is to put all of 'em down, and to select hanging juries.
Perhaps both reasons played a part in the 1977 Supreme Court decision; I don't recall the debate about rape convictions being unfairly handed down based on race. I remember the decision only because I was a liberal feminist at the time, (I was 19, young, stupid and highly influenced by my college profs) and didn't believe in the death penalty. But I had mixed feelings because I hated the rapists too! Well, I still think rapists are the scum of the earth, but I have no longer have a problem with the death penalty.