There are several possible explanations for hesitation, ranging from banal to opportunistic. Public release could reveal intelligence sources, such as human informants or electronic surveillance. More cynically, Turkey could seek a deal with Saudi Arabia that would allow both sides to continue without pushing for it.
On the day of Mr. Khashoggi's disappearance, 15 Saudi officials flew to Istanbul with two private-chartered private jets to Istanbul, with close ties to the Crown Prince and the Saudi Interior Ministry, the Turks say. They say that the Saudis went to the consulate, killed Mr Khashoggi and disposed of his body, returned to the airport the same day, and left Turkey.
Saudi officials allowed a group of Turkish investigators to search the consulate for the first time on Monday, and the Turks spent hours with it to go on early Tuesday morning. They were expected to reenter the consulate on Tuesday, as well as the residence of the nearby consul, who, as the Turkish news media suspected, may also have been involved in the attack.
In the midst of international outrage over the disappearance of United Nations human rights chief Michelle Bachelet said on Tuesday that the Saudi authorities should reveal everything they know.
Given the gravity of the case, Saudi Arabia should provide for international agreements to immunize diplomats and diplomatic premises, said Ms. Bachelet, urging Turkey and Saudi Arabia to ensure that "no further obstacles" to effective and transparent investigation into were laid the way.
"It is very likely that a crime was committed," said Rupert Colville, a spokeswoman for Ms. Bachelet to reporters in Geneva.