congressional office, giving him immunity. when his term ran out in early 2012, a judge ruled he should stand trial. rios montt has remained mostly silent since the trial began. his daughter, zury, a guatemalan legislatorormer u.s. congressman jerry weller, has been at her father's side, in court and in the court of public opinion. was there genocide during your fathers regime as president here in guatemala? >> ( translated ): in guatemala there was no genocide during any regime. >> reporter: so what happened here? >> ( translated ): in guatemala, there was a confrontation. in guatemala, there was war. >> reporter: but scientists have built a compelling forensics case that offers layers of evidence of a campaign to wipe out innocent indigenous guatemalans. it begins with the exhumations. over the past 20 years, the guatemalan forensic anthropology foundation has unearthed 6,500 bodies from clandestine graves.ç the bones are cleaned, laid out and then carefully analyzed. this skeleton shows evidence of four close range gunshot wounds to the head. the man's hands were tied behind his back: an execution. forensic anthropologist fredy peccerelli-- a guatemalan raised in the bronx-- is executive director he