Who arrests him and who puts him in jail? The police arrest him and bring him to trial - now, if spontaneous order can’t exist, why do they bring him to trial? The law says they have to - so what? There’s no one to make them follow the law - they are the arm of the law. Why don’t they just take the arrested people home as slaves?
Now, maybe there really is no such thing as spontaneous order, and such things do happen more often than we’re led to believe. In that case, the case for anarchy is apparently undermined, until you ask the obvious question - how does having a government fix that problem?
If a person is found not guilty, 99% of the time they go away and go home. Why do the jailers listen to the judges? The judge can be said to be an arbiter, but what if they disagree with the judge? By the way, there are examples where this fails - Abraham Lincoln comes to mind. What happened there? The marshals refused orders from their boss because they willingly held that judge’s decisions should be followed. This is spontaneous order.
Cheney shoots lawyers, we know that. Still, soldiers do not fail to do whatever they want because they think Dick Cheney will shoot them. The question is not who says what should be done, but what makes it actually happen.
Now, you can say that in all of these cases, we’ll just call in the military. Why does it come when called?