A dozen Mexican state police officers have been arrested for their possible involvement in the massacre of 19 people in the northern state of Tamaulipas. The officers face homicide charges. The 19 bodies were found shot and charred in a town near the U.S.-Mexico border in January. Relatives of asylum seekers from Guatemala say they believe some of the dead could be their loved ones, including teenagers who were trying to reach the U.S. Only four bodies have been identified. Two were Guatemalan, and two were Mexican.