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Mr. Chaves’s denial and downplaying of a documented history of sexual harassment come two years after another Costa Rican politician, the former president and a Nobel Peace Prize laureate, Óscar Arias Sánchez, narrowly avoided prosecution for sexual abuse, in a scandal that shook the country.

The latest example was the former Costa Rican president Óscar Arias Sánchez, a Nobel laureate who was accused last week of sexual misconduct by multiple women.

Three more women have come forward to share stories of inappropriate behavior by Nobel laureate and former president of Costa Rica Óscar Arias Sánchez, following accusations of sexual misconduct.

SAN JOSÉ, Costa Rica — A psychiatrist and antinuclear activist has accused Óscar Arias Sánchez, the Nobel laureate and former Costa Rica president, of sexually assaulting her four years ago, bringing the #MeToo movement to one of Latin America’s most revered statesmen.

Dr. Papert was an adviser to Oscar Arias Sánchez, the president of Costa Rica who was given the Nobel Peace Prize in 1987 for brokering an end to civil wars in the region.