Who will hold Saudi Arabia accountable for the murder of Jamal Khashoggi?

A UN Special Rapporteur calls for international investigation into the journalist's killing.

The UN's Special Rapporteur on Extrajudicial Killings has concluded what many others believe - that the Crown Prince of Saudi Arabia must have known about the murder of Jamal Khashoggi.

Agnes Callamard says Saudi agents planned the killing of the journalist and critic of Mohammed Bin Salman - then carved up his body in the Saudi consulate in Istanbul last October.

Callamard is calling for an international and impartial investigation.

So who will hold Saudi Arabia to account?