A top Turkish officer believed Jamal Khashoggi's body had been dissolved in acid
Yasin Aktay said the "only logical conclusion" was that those who killed journalists in Istanbul were destroying the body to leave no traces ".
A Saudi citizen and well-known critic, Saudi ruler Khashoggi was killed on October 2 and his body dismembered.
No forensic evidence was submitted to support the claim that the body was disbanded.
"The reason they destroyed Khashoggi's body was the easier liquidation of his remains," said Aktay, adviser to the Turkish president, in an interview with the daily Hurriyet.
"Now we see that they not only dismembered his body, but also destroyed it."
The allegations were that when Khashoggi's fiancee Hatice Cengiz called on world leaders to "bring the perpetrators to justice," an editorial for five newspapers, including the Guardian and the Washington Post.
Saudi Crown Prince Mohammed bin Salman reportedly told the United States that he considered the murdered journalist Jamal Khashoggi a dangerous Islamist.
The reported White House call came before Saudi Arabia admitted that Khashoggi had died inside the Saudi Arabian Consulate in Istanbul.
Saudi Arabia has denied that the comments were made or that his royal family was involved in the murder and says it was "determined to find out all the facts" the writer was strangled.
What was said in the alleged call of the Crown Prince?
During the call to President Donald Trump's son-in-law, Jared Kushner, and National Security Advisor John Bolton, Prince Mohammed had said Khashoggi had been a member of the Muslim Brotherhood, a transnational Islamist organization, the Washington Post reported.
The call is said to have taken place on October 9, a week after Khashoggi di sappeared.
According to reports, Prince Mohammed called on the White House to preserve the US-Saudi alliance.
In a statement to the newspaper, Khashoggi's family denied that he had been a member of the Muslim Brotherhood and said the murdered writer had repeatedly denied this in recent years.
"Jamal Khashoggi was in no way a dangerous person To say otherwise would be ridiculous," said the statement.
What has the investigation found so far?
There is still no consensus about how Khashoggi died. He entered the consulate to sort out the documents for his marriage to his Turkish fiancé Hatice Cengiz.