New York -
A US oil baron faces losing half his £7.4 billion ($11.2bn) fortune (click here) in what could be the most expensive divorce in history.
Harold Hamm could break the £1.1billion record for a settlement, set by Rupert Murdoch, when he and his wife Sue Ann go their separate ways after 25 years together.
According to the law in Oklahoma, Mr Hamm may have to hand over half the wealth he accumulated running the petrol giant Continental Resources.
The company has been subpoenaed by a US court, along with four other companies owned by Mr Hamm.
The 67-year-old made his fortune as a leading force in the American oil boom and served as the senior energy adviser to Republican presidential candidate Mitt Romney’s campaign.
Time magazine named him one of the most influential people in the world, while Forbes ranks him at 90 on its global wealth list.
Economist and lawyer Mrs Hamm, 56, has held key posts at Continental, which could play in her favour when the settlement comes to be drawn up, but she no longer works for the company....