Updated: 20:29, Friday December 09, 2005
The family of Jean Charles de Menezes, who was mistakenly shot by police in London, have expressed their "alarm" at a briefing given to media.
It comes after the chairman of the Independent Police Complaints Commission said it is "highly likely" that officers involved may face criminal charges.
And he revealed that 30 people witnessed the shooting on the train at Stockwell station in south London.
The Menezes family has said the leak, by IPCC chairman Nick Hardwick, calls into question the organisation's "credibility".
They said: "The IPCC recently announced it was investigating the information released by the Metropolitan Police in the hours following Jean Charles' death, including off-the-record briefings to journalists.
"We are dismayed to find that the IPCC appear to have adopted similar tactics."
Mr de Menezes was hit in the head by several bullets shot by police who mistakenly thought he was carrying a bomb.
The killing came on July 22 - a day after attempted bombings on London's transport system and two weeks after more than 50 people were killed in terror attacks on the capital.
The investigation into the incident has not yet been completed but Mr Hardwick said he will probably send a file to the Crown Prosecution Service suggesting that charges could be brought.
The CPS will then decide whether or not to press ahead with charges.
Sky News' Crime Correspondent Martin Brunt said: "We don't know what these offences are but potentially the officers who carried out the shooting of Mr de Menezes... potentially face murder charges.
"But there are a number of charges that could be considered and there are a number of officers - not just those directly involved in the shooting - who could face criminal charges or disciplinary matters."
Mr Hardwick also revealed that the Metropolitan Police Commissioner is not among those who have been interviewed as part of the probe. However, it is not clear whether Sir Ian Blair has given a statement.
The file is likely to be sent to the CPS in January and the contents of the reports are likely to be made public - but this could take months, or even years.