The decision coincided with efforts by President Recep Tayyip Erdogan of Turkey to improve his country’s relationship with Saudi Arabia. Last week, the Turkish foreign minister, Mevlut Cavusoglu, said in a televised interview that “concrete steps” were on the way to mend ties with the Arab world’s richest state.
The Turkish trial, which opened in 2020, was largely symbolic because Saudi Arabia had refused to extradite the suspects and Turkish law does not allow convictions of people who have not testified.
Mr. Khashoggi was a prominent journalist who fell out with his government and moved to the United States, where he wrote columns for The Washington Post that were critical of Saudi Crown Prince Mohammed bin Salman and his plans to remake the kingdom. Mr. Khashoggi was killed and dismembered by a Saudi hit squad inside the Saudi Consulate in Istanbul, where he had gone to get paperwork he needed to marry his Turkish fiancée, Hatice Cengiz.
His body has never been found.
Prince Mohammed has insisted he knew nothing of the murder plot in advance. However, the Central Intelligence Agency concluded that he had greenlighted the operation to kill or capture Mr. Khashoggi.
The murder, and the Turks’ dribbling out of details to keep the case in the spotlight, exacerbated longstanding tensions between Turkey and Saudi Arabia over Turkey’s relationship with political Islamists in the Arab world and its support for the anti-government uprisings of the Arab Spring, which Saudi Arabia largely opposed.