Before revision: On March 28, 2013, the Washington Post reported that federal investigators "routinely" use the systems to track criminal suspects, but sometimes fail to explain the technology sufficiently to magistrate judges from whom they seek search warrants .
After revision: On March 28, 2013, the Washington Post reported that federal investigators "routinely" use the systems to track criminal suspects, but sometimes fail to explain the technology sufficiently to magistrate judges from whom they seek search warrants