"The result of the test was positive. We have found my nephew after 35 years," Kivo Carlotto, who is human rights secretary for Buenos Aires province, told Todo Noticias television.
While the family were overjoyed to find their missing relative, it was also "a terrible feeling", Kivo Carlotto said, adding that the revelation was also "a terrible shock" for his nephew. "But he presented himself voluntarily and he's doing all right," the uncle said.
News of the discovery was delivered to Carlotto by Servini de Cubria.
Servini de Cubria said the man's DNA was compared with the remains of his father.
The Grandmothers of the Plaza de Mayo and a sister group, Mothers of the Plaza de Mayo, have been leading a nationwide effort to reunite an estimated 500 children who were taken from leftists and government opponents during the dictatorship.
As many as 30,000 "disappeared" are presumed to have been murdered during Argentina's "dirty war" against leftists. In many instances, their children were taken by ruling families and raised as their own.
The Grandmothers group, which was founded in 1977, has managed to locate scores of missing children. Laura's son is the 111th child that has been found so far. AFP