Rare people

Watching British detective series it has often struck me that no matter in how seemingly remote a place a person has been killed, the body will typically be found within a few hours. An explanation for this might be suggested by Northumberland (where Vera is located) being the most sparsely populated county of England at 63 persons/km², which population density is in Sweden only surpassed by the three “big city” counties of Västra Götaland, Skåne, and Stockholm.