FILE - EDS NOTE: GRAPHIC CONTENT This is a Monday March 8, 2010 file image taken from TV showing a mass grave for victims in the town of Dogo Nahawa, Nigeria, about three miles (five kilometers) south of the city of Jos. Nigeria’s government has largely ignored years of “mass murder” in two central states, Human Rights Watch charged Thursday Dec. 12, 2013, failing to prosecute known perpetrators who have burned victims alive and hacked and shot to death others because of their tribe or religion. (AP Photo/APTN, File) TV OUT