Meanwhile, the reporter's sons have issued desperate pleas to find their father's body so that they can give him a proper burial and receive closure. "We gave them to Saudi Arabia, to America, to the Germans, French and the English - we gave them all".
Al Jazeera has learned on Friday that traces of acid were found at the Saudi consul general's residence in Istanbul, where the body was believed to be disposed of with the use of chemicals.
Add Jamal Khashoggi as an interest to stay up to date on the latest Jamal Khashoggi news, video, and analysis from ABC News.
The voice attributed to a Saudi forensic evidence chief also suggests that others witnessing Khashoggi's harrowing fate listened to music in order to drown out the sounds.
Jamal Khashoggi, who was an outspoken critic of Mohammed bin Salman, was killed after he entered the Saudi consulate in Istanbul on October second.
Mohammed Bin Salman (MbS) and Saudi Arabia have changed their official position on what happened to the journalist in the face of worldwide pressure.
Unconfirmed reports of the contents of gruesome tape allege that Khashoggi was grabbed, drugged and dismembered on a tape with a bone saw. Yet some of those implicated in the killing are close to the crown prince, including a member of the prince's entourage on foreign trips who was seen at the consulate before Khashoggi's slaying.
US President Donald Trump, meanwhile, has oscillated between statements backing MBS's version of events and pouring scorn on the official lines coming out of Riyadh.
Khashoggi went missing on October 2 after entering the consulate to obtain documents for marriage procedures.
Saudi Arabia has presented an evolving narrative about what happened to Khashoggi, a Saudi citizen. "They know for certain who among the 15 is the killer or are the killers", he said.