Fadil died in Milan on March 1st at the age of 33, after fighting aggressive poisoning symptoms following her admittance to a hospital on January 29, according to Reuters.
The popular model had earlier testified against former Italian Prime Minister Silvio Berlusconi in a 2012 trial in which the leader was accused of soliciting sex from and paying for sex with underage girls and prostitutes.
Fadil provided a shocking level of eyewitness detail documenting the Italian strongman's infamous orgies, including young girls clad only in nun's habits dancing around a pole in front of the EU-member nation leader and his cronies, according to BBC.
At the time of the testimony, which caused a widespread scandal and ultimately up-ended Berlusconi's political career, Fadil noted that there were those who meant her harm, particularly as she had been offered large amounts of cash for her silence, according to Nypost.com.
First convicted, Berlusconi was then acquitted, following a male judge's ruling that the Italian leader did not know that the underage female sex worker was actually younger than eighteen.
Prosecutors again charged Berlusconi and his circle, this time for attempting to bribe witnesses as a means of keeping them from speaking out about the practice.
Fadil, who did not suffer accusations of bribe-taking, was reported by Italian media to have been working on a book about her experiences. A copy of the manuscript was obtained by prosecutors prior to her death.