The murders Americans won’t commit

Exhibit A in the Ricardian argument for the free movement of labor:

Chandler police are investigating the bizarre case of a man who was stabbed, decapitated and left in a pool of blood in a central city apartment. One man has been arrested and police are seeking three more suspects in what may the city’s first beheading. “We don’t go to many cases where the victim has been decapitated,” said Chandler Police Det. Frank Mendoza.

At some point, I wonder if people are going to begin to realize that a) there are more immigrants than ever before, and b) the economy is not growing in proportion with them as the Ricardian argument predicts.