BBC has admitted to using private detectives to provide confidential information for some of its investigative news programmes.
The corporation had been accused of employing Jonathan Rees, a private investigator with a criminal conviction for perverting the course of justice.
Rees was also charged with the murder of Daniel Morgan, a former business partner, and spent two years on remand before the case against him collapsed last Friday.
He was the subject of a Panorama expose this week. It was claimed on the show that he introduced a senior News of the World executive to a hacker who used a computer virus to illegally obtain sensitive emails from a former Army intelligence officer.
But after the programme went out on Monday, Mr Rees disclosed he had also worked for Panorama on two programmes in the early 1990s.
He made the disclosure on camera after Panorama reporters confronted him at the end of the murder case.
He told them: 'The adage pot, kettle, black is at play here. But his apparent claims were edited out of the programme. In a statement the corporation said yesterday: 'The BBC, like the rest of the media, employs private investigators on occasion to research stories which are in the public interest.
BBC insiders said Panorama was among the programmes that purchased such services. The corporation did not categorically deny that any of its journalists had ever employed Mr Rees but added they could find no evidence he had been commissioned. Daily Mail