By the time King joined the project, the dictatorship had been replaced by a democratic government, but it required proof of kinship to remove children from families and return them to biological families. King's technique, using mitochondrial DNA and human leukocyte antigen serotyping genetic markers from dental samples, proved invaluable. The Supreme Court of Argentina in 1984 determined that King's test had positively identified the relationship of Paula Logares to her family, establishing the precedent for the ultimate reunification of dozens of families with their stolen children.