A colleague of Jamal Khashoggi has called a photo of the journalist's son shaking hands with the Crown Prince Mohammed bin Salman "gross" and "disgusting".
Dr Brian Klaas, a Washington Post columnist and professor in global politics at University College London, said the photo opportunity was like something "out of a Game of Thrones plot line".
"This is something that's out of a Game of Thrones plot line. To force the son to shake hands with the Prince on camera, it's disgusting," Dr Klaas told Julia Hartley-Brewer.
Crown Prince Mohammed bin Salman has been accused of orchestrating the killing of Jamal Khashoggi.
'Prisoner of his own country'
"The Crown Prince should have understood that that picture was not going to go over well in the West. He should have understood that we would have seen that this prisoner of his own country being forced to shake hands with the guy who ordered his dad's assassination is gross, it's disgusting."
Photos of Mr Khashoggi's two sons meeting Saudi Arabia's King Salman and Crown Prince Mohammed bin Salman were circulated on Saudi state media.
- Read more: Saudi’s version of events is ‘an insult to the intelligence of people’, says Turkey expert
- Read more: Donald Trump: Killing of Saudi journalist was the 'worst cover-up ever'
It has been reported by the Washington Post editor that the murdered journalist's children have been barred from leaving the country.
Dr Klaas claimed he feared for his own safety in the current climate, and said journalists should be able to rely on Western governments to "punch back" if they're murdered.
"I have to wonder would Donald Trump look at the fact that I criticised him," Dr Klaas said. "Would he look at the fact that I write for the Washington Post and then look at the authoritarian government that pay either him directly or buy weapons from the US and make a calculation that it's not worth it to sour diplomatic ties over somebody's death?".
"That's not something that journalists need to worry about. They should be able to count on Western governments to punch back hard when they're murdered."
He added: "There are private ways to make Saudi Arabia feel some serious pain and that is to withdraw from investments, as people like Richard Branson have started to do, and also just think of this country as a place where it's not worth doing business because of the reputational risk.That would do more damage to Saudi Arabia in the long run than short-term sanctions."