That is the oft-told story of the death of the Duke of Gandia. Those are all the facts concerning it that are known or that ever will be known. The rest is speculation, and this speculation follows the trend of malice rather than of evidence.
Suspicion fell at first upon Giovanni Sforza, who was supposed to have avenged himself thus upon the Pope for the treatment he had received. There certainly existed that reasonable motive to actuate him, but not a particle of evidence against him.
Next rumour had it that Cardinal Ascanio Sforza’s was the hand that had done this work, and with this rumour Rome was busy for months. It was known that he had quarrelled violently with Gandia, who had been grossly insulted by a chamberlain of Ascanio’s, and who had wiped out the insult by having the man seized and hanged.
Sanuto quotes a letter from Rome on July 21, which states that “it is certain that Ascanio murdered the Duke of Gandia.” Cardinal Ascanio’s numerous enemies took care to keep the accusation alive at the Vatican, and Ascanio, in fear for his life, had left Rome and fled to Grottaferrata. When summoned to Rome, he had refused to come save under safeconduct. His fears, however, appear to have been groundless, for the Pope attached no importance to the accusation against him, convinced of his innocence, as he informed him.
Thereupon public opinion looked about for some other likely person upon whom to fasten its indictment, and lighted upon Giuffredo Borgia, Gandia’s youngest brother. Here, again, a motive was not wanting. Already has mention been made of the wanton ways of Giuffredo’s Neapolitan wife, Doña Sancia. That she was prodigal of her favours there is no lack of evidence, and it appears that, amongst those she admitted to them, was the dead duke. Jealousy, then, it was alleged, was the spur that had driven Giuffredo to the deed; and that the rumour of this must have been insistent is clear when we find the Pope publicly exonerating his youngest son.
Thus matters stood, and thus had public opinion spoken, when in the month of August the Pope ordered the search for the murderer to cease. Bracci, the Florentine ambassador, explains this action of Alexander’s. He writes that his Holiness knew who were the murderers, and that he was taking no further steps in the matter in the hope that thus, conceiving themselves to be secure, they might more completely discover themselves.