Let’s consider three situations.
A) My neighbor buys a new car. I see it and steal it. My neighbor realizes it is missing, and then sees it on my property. He calls his PDA, and there is a trial.
B) My neighbor buys a new car. That night, someone else steals it. The next day, I (not realizing that my neighbor had even bought a car) buy the same car. I didn’t know it was stolen, or I wouldn’t have bought it. Nevertheless, my neighbor sees his stolen car on my property, and calls his PDA. There is a trial.
C) My neighbor buys a new car. That night someone else steals it. The next day, I buy a new car, not a stolen one, but that happens to be the same make, model, color, etc. as his. My neighbor sees what appears to be his car on my property, and calls his PDA. There is a trial.
Now, in all three situations, the appearance is the same. My neighbor bought a car, and now it seems to be on my property. However, in cases B and C I am innocent, while in case A I am not. Because situation A could be true, the justice service must investigate. However, If the arbitration service my neighbor uses sees a defendant as innocent until proven guilty they cannot enter my property - this would be initiation of aggression. If, instead, they assume me guilty until proven innocent, then they may use retaliatory aggression to investigate or even arrest me. In situation C, I can likely prove my innocence, but in B I cannot. it would simply be my word that I didn’t steal the car. Further, if they find me innocent, I can then bring charges against them for initiation of aggression.
So wouldn’t any justice service have to a) find me guilty unless I could prove myself innocent, and b) then have a financial incentive for making sure I didn’t prove my innocence?
Also, given the fact that people get upset when courts render unpopular verdicts, wouldn’t an arbitration service have to make sure their verdicts were popular to keep their customers happy, regardless of true justice?
Yes, in some cases it is clear that retaliatory force is justified, but not in every case.