 On 9 June, the two were killed by a group of ""cagoulards"", militants of the Cagoule, a French fascist group, with archival documents implicating Mussolini's regime in authorizing the murder.The two brothers were buried in the Père Lachaise Cemetery in Paris but in the 1951 the family moved them to Italy into the Monumental Cemetery of Trespiano, a frazione of Florence.His wife Marion Catherine Cave, their three children, Giovanni Andrea "John", Amelia "Melina", and Andrew, and his mother Amelia Pincherle Rosselli survived him.