A person is found on the sidewalk dead of foul play. No ID (wallet obviously stolen), no witnesses. Assuming the nation is governed by anarchy, how will he be identified and how will his killer be brought to justice?
You're still thinking in the box. What's a sidewalk? A place owned by government. Almost of this kind of crime takes place in "public" places.
How often are people "found dead" in shopping malls? Almost never. Unlike governments, private citizens take care of their property. What's more, if it did happen, you can be damned sure that the owners would want to get the perp. This kind of thing could be bad for business, don't you know?