the crime, nor his motivations, are not known with certainty. Suspects As the killers were never identified, there are three theories as the suspects and motives: The killer was either his younger brother Gioffre Borgia who murdered him due to Giovanni's relationship with Gioffre's wife, Sancha or his brother Cesare Borgia who also had a relationship with Sancha. [One salient fact is that Alexander despite his immense grief over Juan's death closed the investigation after a week (i.e. Alexander knew or suspected the killer was a member of his own family)] The killer was Antonio Maria della Mirandola the father of a young girl, whose house was located near the Tiber. Shortly before his death, Juan did not miss the opportunity to mention that he dishonored the daughter of one of the representatives of the ancient Roman family.. The murder by revenge of relatives for the death in the Neapolitan prison of Virginio Orsini, one of the heads of this family hostile to the pope, whose possessions the father planned to give to the murdered son (the murder was committed in the quarter where many of their people lived, and the mule of the victim was found there) In popular culture In most adaptations, he is referred to by his Spanish name, Juan. In Alexandre Dumas' Celebrated Crimes (1839), he is referred to as Francesco. In Mario Puzo's historical novel The Family, Giovanni Borgia's murder by his younger brother Geoffre is central to the drama and plot of the story. In the 2010 animated short film, Assassin's Creed: Ascendance, a fictionalised version of Juan's death is depicted at the hand of Cesare Borgia, who hires a prostitute to murder him. In the 2011 Showtime series, The Borgias, Juan is played by David Oakes and is killed by Cesare in the second season of the series, in "World of Wonders". In the 2011 French/German series, Borgia, Juan is played by French actor Stanley Weber. He is a main character in the first season and dies in that season's finale "The Serpent Rises". In this adaptation, he is the eldest child of Rodrigo and Vannozza, and his murder is perpetrated primarily by Lucrezia—with the help of her lover, Pedro Caldes. Both portrayals depict Juan as haughty, selfish, and cruel, with few redeeming features. The CBBC television show Horrible Histories features a song portraying the Borgia family, with Ben Willbond as Giovanni Borgia.