"We therefore respectfully call on you to immediately authorise an independent, global investigation into the murder of Jamal Khashoggi that would lay the groundwork for identifying and holding accountable the perpetrators of this grievous crime".
"We now see that it wasn't just cut up, they got rid of the body by dissolving it", said Yasin Aktay, a top adviser to Turkish President Recep Tayyip Erdogan.
The official was cited as saying that "biological evidence" found in the consulate's garden indicated the body was likely disposed of near where Khashoggi was killed. What was the reason for them to murder him so brutally.
"We know that the order to kill Khashoggi came from the highest levels of the Saudi government", he wrote in an article in the Washington Post. Earlier Turkish media reports said audio recordings captured Khashoggi being tortured before his death. On Wednesday, Switzerland announced it was suspending arms exports to Saudi over Khashoggi's killing.
One person familiar with the White House's deliberations said the administration expects to impose some sanctions on Saudi Arabia over the Khashoggi killing, in part because of bipartisan pressure from Congress.
Saudi Arabia's chief prosecutor, Saud al-Mojeb, neither provided the location of Khashoggi's body nor identified a Turkish conspirator when he visited Istanbul this week, a second senior Turkish official told The Post.
Khashoggi's family rejected the characterization in a statement to the newspaper.
Khashoggi's fiancee wrote in an op-ed piece published Friday in The Washington Post the Trump administration's response to Khashoggi's death has been "devoid of moral foundation".
What happened to the Saudi Arabian journalist and critic of the Saudi Crown Prince has been the subject of denials, official leaks, presidential speeches, changing Saudi narrative. and global outrage. The Turks added that the Saudi prosecutor also said no statement had been made by Saudi authorities about the existence of the purported local cooperator.
The murder of Mr Khashoggi, a Washington Post columnist and vocal critic of Saudi Arabia's de facto ruler Crown Prince Mohammed bin Salman, sparked global outrage and threw the oil-rich nation into crisis.
In an op-ed published on Friday in several news outlets including Le Monde and The Washington Post, Ms Cengiz urged the global community to "bring the perpetrators to justice", adding that "the United States should be leading the way".