Key witness in prostitution of minor trials involving Italy ex-Premier Minister Silvio Berlusconi has died after suspecting being poisoned. A murder probe has been opened into a Moroccan-origin model Imane Fadil death, police said, adding she died after month of “agony“. Ruby witness Imane Fadil dies (6). Murder probe opened https://t.co/YEzmS0BstQ — Ansa English News (@ansa_english) March…