LONDON - A British coroner said he could not say for certain how a wealthy Egyptian businessman suspected of spying came to fall to his death. But William Dolman says there is no evidence Ashraf Marwan was murdered. Marwan fell from the balcony of his London apartment in June 2007. Marwan was son-in-law of former Egyptian President Gamal Abdel Nasser and an aide to Nasser's successor, Anwar Sadat. Dolman on Wednesday handed down an "open verdict" at an inquest, meaning it had not been proven how Marwan died. But he said there was no evidence to support allegations of murder. The coroner says "we simply don't know the facts, despite careful investigation." Historians and intelligence agents have accused him of being an Israeli spy ��" or a double agent loyal to Egypt. He also rejected suggestions that he committed suicide. But Marwan's widow Mona Abdel Nasser, the daughter of Egypt's late President Gamal Abdel Nasser, said she still believed he was murdered. Speaking outside the Coroner's Court, she said: "He was murdered. I'm sure that there was somebody else involved. "The truth will come out. They are still discovering things about Tutankhamun. How can he fall? Never. He was pushed." Marwan's family added in a statement: "Dr Ashraf Marwan, beloved husband, father and grandfather, died in suspicious circumstances on June 27 2007. "Approximately three years later, the coroner for Westminster conducted an inquest. He heard oral testimony and considered a significant number of documents. "Today the coroner returned an open verdict ruling out any suggestion Dr Marwan took his own life. The family accept the coroner's decision and would like to thank friends, family and advisers who have helped them during this difficult time."