Forbes – Rupert Murdoch and his son James first refused, then agreed Thursday to appear before U.K. lawmakers investigating phone hacking and police bribery, while in the U.S., the FBI opened an investigation into allegations the Murdoch media empire sought to hack into the phones of Sept. 11 victims.

Those two developments – and the arrest of another former editor of the scandal-sunk U.K. tabloid News of the World – deepened the crisis for Murdoch’s News Corp. which has seen its stock price sink as investors ask whether the scandal could drag down the whole company.

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