"I will be forever grateful he chose The Post as his final journalistic home one year ago and gave us the chance to work together", she wrote.Now I have to accept: "That is not going to happen", Attiah wrote Wednesday.
Khashoggi, a critic of the Saudi monarchy who wrote for The Washington Post, has not been seen since that day.
Missing journalist Jamal Khashoggi's Turkish fiancee Hatice Cengiz wait in front of the Saudi Arabian consulate in Istanbul on October 3, 2018.
Khashoggi, a USA resident, was last seen going into that Saudi government building more than two weeks ago to get papers he needed to marry.More news: Facebook Inflated Video Metrics By Up To 900%, Marketers Claim 10/17/2018
According to daily Yeni Şafak, Turkish forensics experts found "evidence of murder" at the consulate.
Riyadh insists that he left the consulate safely.
Ms Attiah said the column was a ideal example of Khashoggi's commitment and passion for freedom in the Arab world, which was "a freedom he apparently gave his life for". "If it exists we have asked for it", Trump told reporters in the Oval Office.
According to the reports, the assassination squad included agents tied to Crown Prince Mohammed bin Salman, a powerful figure in the Saudi royal family and lynchpin in the trend toward ever-tightening relations with the White House.
His demand came as he expressed support for Saudi Arabia, a long-time USA ally, and said he expects its investigation into Khashoggi's disappearance would be completed by the end of the week.More news: NASA's Chandra Observatory back in action
Turkish media with close links to the government have published gruesome details on the alleged audio, saying screams, and the voice of the consul, Mohammed al-Otaibi, could be heard in the recording.
A joint-probe into the case by Saudi Arabia and Turkey is ongoing.
Mr Trump has previously vowed to inflict "severe punishment" on Saudi Arabia if it was behind Mr Khashoggi's killing - but also said he is against cancelling military contracts with Riyadh.
Many other senior figures had already dropped out of the event in recent days, including Christine Lagarde, head of the International Monetary Fund, and a number of companies, including tech giants Google and Uber and media companies including the New York Times and the Financial Times.
United States media and officials have called on Ankara to release the evidence, but the Turkish investigators have not done so yet.More news: U.S. may lift Turkey sanctions after USA pastor's release: Pompeo