The 37-year-old son of King Salman is already seen as the de facto ruler of the Gulf state.
As F1 races in Saudi Arabia, can it be a positive thing for female and LGBT rights?
Mohammed bin Salman discussed assassinating the late King Abdullah in 2014, Saad al-Jabri says.
Hatice Cengiz, who was engaged to the murdered journalist, calls on world leaders to take action.
