Where is the body?

The Washington Post reports:

The Saudi government acknowledged early Saturday that journalist Jamal Khashoggi was killed while visiting the Saudi consulate in Istanbul, saying he died during a fist fight. ... The announcement marks the first time that Saudi officials have acknowledged that Khashoggi was killed inside the consulate. Ever since he disappeared on Oct. 2 while visiting the mission, Saudi officials have repeatedly said that he left the consulate alive and that they had no information about his whereabouts or fate. He had gone to the consulate to obtain a document he needed for an upcoming wedding.

So by the Saudi's own admission now, they initially promulgated a completely indefensible lie about Khashoggi's fate.  He was dead, and they knew he was dead, and yet for days they insisted he left the consulate alive.

So there are two obvious questions someone needs to ask the Saudis: why should we believe you now?  And where is the body?