Yes, I think people who serve in the criminal justice system should be able to serve on juries. I don’t think anyone should be automatically excluded from serving on a jury merely because of what they do. Someone in those kinds of jobs might know more about how the system works but that doesn’t mean that they are intrinsically incapable of objectively weighing the evidence presented at trial in any one particular case. As you are aware, during jury selection both the defense and the prosecution have opportunities to dismiss jurors. I’m not a lawyer but I believe that either side can strike as many jurors as they like “for cause,” though I don’t know exactly what sort of biases or conflicts of interest, etc. are necessary to meet the legal standard of “for cause” but I think it generally includes things like you mentioned, having a foot injury in a foot injury case, a personal experience that might bias the person, or something like knowing the people involved in the case, something that demonstrates they can’t be impartial, like a strong opposition to the death penalty in a death penalty case, and both sides are permitted a certain number peremptory strikes, where they can dismiss a juror for no reason at all, at least not one that they have to defend to the court. That seems to be a pretty good system a pretty good process, one that can weed out anyone who works in any area of the criminal justice system, or anyone else who can’t serve as an objective and impartial juror.