The AAA Committee for Human Rights has written to Guatemalan authorities on numerous occasions regarding the safety of the Guatemalan Forensic Anthropology Team (FAFG), especially its director Fredy Peccerelli who, along with his family, has been the target of several death threats. FAFG exhumes mass graves in an effort to identify massacre victims of Guatemala's 36-year insurgency, during which an estimated 200,000 people were killed and numerous human rights violations occurred. Fredy and the rest of FAFG are hoping to compile enough evidence to identify and prosecute the perpetrators of these massacres. You can read the full story from Scientific American here. And a related story on FAFG's most recent efforts.