The mother of Jean Charles de Menezes today called for the London police officers who shot her son to be "punished".
Metropolitan Police Commissioner Sir Ian Blair: The family of Mr de Menezes have called for his resignation and they will stage a vigil this evening outside Downing Street.
Maria de Menezes spoke of her torment as relatives and supporters of the 27-year-old electrician prepared to hold a vigil outside Downing Street one month on from his death.
Speaking of the anti-terror officers who shot him dead, supposedly fearing he was a suicide bomber, Mrs de Menezes told the BBC Radio 4 Todayprogramme: "They took my son's life. I am suffering because of that.
"I want the policeman who did that punished. They ended not only my son's life but mine as well."
Her comments come as Brazilian officials flew in to question the investigators examining his death.
Two senior Brazilian justice officials are due to arrive at Heathrow Airport this afternoon to meet those examining the events that led to his shooting.
Wagner Goncalves, of the Federal Prosecutor's Office, and Marcio Pereira Pinto Garcia, of the Ministry of Justice, are looking for answers to "a number of matters".
They will meet members of the Independent Police Complaints Commission, Met Deputy Assistant Commissioner John Yates and other officials during a four-day visit.
Obtaining "clarification" on the string of revelations which emerged last week about the death of Mr de Menezes is likely to be top of their agenda. Official documents leaked to ITV News appeared to contradict earlier police and witness accounts of the shooting at Stockwell Tube station a month ago today.
Mr de Menezes was shot seven times in the head by anti-terror officers from the Metropolitan Police after being mistaken for a suicide bomber. However, the leaked papers showed that he had done little to arouse suspicion and had not fled from armed officers as previously thought.
Claims that there was no CCTV of his final moments at Stockwell station were also being disputed today. Reports alleged that police had returned the tapes taken from CCTV cameras trained on the platform saying: "These are no good to us. They are blank."
However, a senior industry source said: "There is absolutely nothing to suggest that the CCTV cameras were not working at this station. If a tape is taken away to be studied it is automatically replaced."
Tube Lines, the private firm which maintains the station, has already said that it was unaware of there being any faulty equipment.
The affair has piled pressure on Scotland Yard chief Sir Ian Blair and led to calls for his resignation.
PA