Colorado shooter to face 24 counts of first-degree murder, 116 counts of attempted murder

Let the jury determine if guilty or not but I would rather let the family decide the punishment because how often is a jury of your peers really a jury of your peers? So how will they get the punishment right? Let the families decide the punishment, and if they can't come to a conclusion what says a jury will do any better?

I am just dubious with the court system due to previous personal experience.