READ MOREIn the second part of our programme about Donald Trump’s controversial friends, we set our sights on the Israeli billionaire Lev Leviev, who is controversial because he is suspected of trading in blood diamonds. Not only is he one of the world’s biggest diamond traders and owns prestigious stores in New York and Moscow, but he is also the owner of Siebel, the Netherlands’ biggest jewellery chain. Leviev has ties with Russian president Putin, US president Trump and his son-in-law and senior adviser Jared Kushner. Trump, however, claims he hardly knows this “King of Diamonds.” Zembla investigates Lev Leviev’s business empire.