Illegal Immigration: An Arizona rancher is murdered while patrolling his ranch. A gaping hole in the border fence and footsteps back to Mexico tell the tale. When will we put the National Guard back on the border? Robert N. Krentz Jr., 58, scion of one of the best-known and oldest ranching families in southeast Arizona, was found shot to death March 27 on his vast, remote ranch after radioing to his brother that he was checking out someone he believed to be an illegal immigrant. Krentz was found slumped over his ATV on his 35,000-acre ranch about 35 miles northeast...