 In 2007, journalists at "L'Espresso" cited Trifa among the suspected war criminals who, it claimed, may have been actively aided by the Roman Catholic Church in avoiding investigation.The magazine suggested that the frequency of such cases could help explain why Italy had been resisting the ratification needed for opening the International Tracing Service archives managed by the International Committee of the Red Cross and kept in Bad Arolsen.The papers of Dr. Charles Kremer, dating from 1930–1984 and documenting his lifelong work to bring Trifa to justice, are housed in the Special Collections of Lloyd Sealy Library, John Jay College of Criminal Justice.