According to a BBC News report the remains of former President of Brazil, Joao Goulart will be exhumed to establish whether he died of natural causes or was poisoned.

Mr Goulart, widely known as Jango, died in 1976 in exile in Argentina. His cause of death was deemed to have been a heart attack.
But a former Uruguayan intelligence officer has said Mr Goulart was poisoned by agents working for the region’s military governments.
He governed from 1961 to 1964.
Forensic scientists commenced work on Wednesday morning, digging a hole in the grave to create an escape for gases which had formed inside the tomb.
Mr Goulart, a progressive leader with left-wing sympathies during the height of the Cold War, was deposed in the 1964 military coup and replaced by the repressive Caetano dictatorship.
Goulart fled first to Uruguay, where he settled as a farmer, and in 1973 to Argentina on the invitation of its President, Juan Peron.
Mr Goulart was found dead on 6 December 1976 in the Argentine city of Mercedes, nine months after a military junta had overthrown the government of Juan Peron’s widow, Isabel Peron.
Officials at the time said he had died of a heart attack, but no post mortem examination was carried out by the authorities in either Argentina or Brazil, where he was taken for burial.
Doubts about his death resurfaced five years ago when a former Uruguayan intelligence officer serving a sentence for drug smuggling in Brazil alleged Mr Goulart was poisoned by Uruguayan agents at the request of Brazilian military rulers.
The intelligence officer, Mario Neira, said the alleged murder was part of Operation Condor, a plan under which the military governments of Argentina, Bolivia, Brazil, Chile, Paraguay and Uruguay collaborated to eliminate their political opponents in the 1970s and 80s.
Neira alleges that Mr Goulart died after his heart medication was swapped with one altered to cause a cardiac attack, by agents working on behalf of the Brazilian military.
Brazil’s National Truth Commission, which started work last year, agreed to investigate the claims with the help of the presidency’s human rights commission.
“The exhumation will put an end to the anguish of his family and thousands of Brazilians who have sufficient reason to believe that his death did not occur spontaneously, as stated in the death certificate – which was issued without a prior post mortem examination,” the Brazilian human rights commission said.
The former president’s grandson, Joao Marcelo Goulart said it was “an historic moment not just for the family but also for the country and all the relatives of those killed, disappeared, tortured and exiled by the military dictatorship”.
Goulart was one of the many victims of the deliberate policy of the US to remove leftist governments in Latin America by any means during a heightened period of the Cold War.
This policy of the US was vigorously pursued by the US in pursuit of furthering their geo-political and economic interests and it was executed by both covert and overt means, and in this regard the Central intelligence Agency (CIA) was a key player.
It was during this period too that the US was working relentlessly, in collaboration with local reactionaries here, to destabilise the People’s Progressive Party (PPP) government under the Premiership of Dr Cheddi Jagan. In doing so sabotage, terror and engineering of racial division were employed which resulted in hundreds of deaths, millions of dollars in loss of property and many became homeless as a result of the numerous arson attacks.
Eventually as in Brazil, the PPP government was removed in 1964 through Anglo-US machinations which saw the electoral system changed from First Past the Post to Proportional Representation. It was indeed one of the darkest and most unfortunate periods in the history of this country. And more darkness followed as Guyanese had to endure 28 years of dictatorial rule during which time the country virtually collapsed as we became economically bankrupt, social services and infrastructure dipped to the lowest ebb and shortages of food and almost every consumer item became the norm.
What is ironic is the fact that those who engineered the removal of governments not to their liking are the very ones who claim to be champions of human rights, freedom and democracy. But nothing could be more hypocritical, because how could freely elected governments be removed by overt and covert means and replaced by dictatorships in the name of human rights, freedom and democracy?