I used to work for a Detroit based bank doing security escorts for bank employees that had to testify in bank robberies, check fraud, or whatever they were victims/witness of crimes at the bank branches. Even though it was Detroit, a basically all black city, the jurors in the defendants trials were never "a jury of peers". It was always old white people from the suburbs because the cases were tried in a county court. A prosecutor or a defense attorney can really stack a jury the way they want to during selection. Also, poor people don't get paid days off from their low paying jobs, so they tend to do whatever they can to be dismissed, where as well to do people have all the time in the world. Those well to do people can be very out of touch and think cops are always the "good guys".