Black Country MP Tom Watson (Lab West Bromwich East) told News Corp boss Rupert Murdoch that his company faced a new scandal as devastating as the phone hacking scandal, when he travelled to Los Angeles to confront the media mogul in person.
He took part in News Corporation's annual general meeting in the US, after being appointed as a proxy by the US trade union organisation AFL-CIO, which owns a small amount of News Corp shares.
Mr Watson, who led the campaign to expose phone hacking by journalists on the News of the World, the former Sunday tabloid owned by News Corp's subsidiary News International, said police were investigating allegations that private investigators employed by the newspaper group hacked computers.
Referring to Glen Mulcaire, the investigator who was convicted of illegally intercepting phone messages in 2007, he said News Corp faced a "Mulcaire 2".
The MP also accused News Corp of employing investigators to impersonate a former Prime Minister (presumably Gordon Brown) and Illegally obtain information from former army intelligence officers.