He has long been praised as an "Italian Schindler", venerated for saving thousands of Jews from the Nazis before paying the price for his bravery in a concentration camp.
But the United States Holocaust Memorial Museum is now removing Giovanni Palatucci from its exhibits while other leading Jewish institutions and the Vatican are reviewing their recognition for his actions after research claimed he was a zealous Nazi collaborator.
The wartime police official in the Italian city of Fiume had been honoured for helping 5,000 Jews avoid deportation, earning him comparisons to Oskar Schindler, the German industrialist who protected Jewish workers and their families. Champions of Palatucci, who later died in Dachau, are campaigning for him to be made a saint and have denounced the claims.
Scholars working with an Italian Jewish research group in New York have identified what they call the "myth" of his role during World War II after studying Italian and German records. The Centro Primo Levi at the Centre for Jewish Studies concluded that Palatucci co-operated with German forces in the round-up of Jews to be sent to Auschwitz.
His supposed actions were invented by his family and eagerly accepted by the Italian state and Catholic Church, they believe.