Ex-security chief threatens 'shock' revelations about Murdoch newspaper empire

The former head of security at Rupert Murdoch’s UK newspaper empire has threatened to blow the whistle with “shock” revelations about the company.

Mark Hanna, who was cleared of perverting the course of justice in the phone hacking trial last year, spoke out after it was confirmed that Rebekah Brooks was returning to News UK – formerly News International.