Salah bin Jamal Khashoggi, a dual US citizen of Saudi Arabia, had previously been unable to leave Saudi Arabia after his passport was restricted by the kingdom a few months ago.
A State Department spokesman said Foreign Minister Mike Pompeo called on the Saudis to release the younger Khashoggi, and Deputy Spokesman Robert Palladino said the US was "pleased" to leave the country.
Later, Saudi officials declared that they had identified 1
According to the Washington Post, Haspel Audio heard of Turkey, allegedly from Khashoggi's murder on 2 October. Palladino confirmed that Pompeo was present at Haspel's instruction in the White House, but did not want to confirm whether he had heard the sound or had seen the video claiming Turkish officials.
Trump has increasingly expressed his frustration with the Saudi reaction. The kingdom has conducted its own investigation under the leadership of the Crown Prince. Palladino said the US did not have a timetable for the investigation, but they would like to see results "as soon as possible".
The aftermath of Khashoggi's assassination has damaged Saudi Arabia, hit the Crown Prince hard, and raised questions about the US's foreign policy priorities, which depend on the Kingdom's funding or cooperation. The ongoing issues have angered Trump, who is increasingly irritated by the negative news coverage, sources say, accusing the Saudis of looking bad.
On Tuesday, Trump told reporters that Saudi authorities had staged the "worst coverup" of the crime, and suggested to the Wall Street Journal that the Crown Prince could be responsible.
"The prince is doing more things there at this stage," Trump said when asked about the involvement of Bin Salman. "He does things and so if someone would be, he would be."
Michelle Kosinksi and Jennifer Hansler of CNN contributed reports.