The family of a Brazilian man shot by police who mistakenly thought he was a suicide bomber urged the government to withdraw the shoot-to-kill policy.
Mr Menezes' cousins demanded justice for the dead man
Jean Charles de Menezes was shot eight times at Stockwell on Friday after fleeing three undercover officers who believed he was a suicide bomber.
Family members held a press conference in London ahead of flying Mr Menezes' body back to Brazil.
One of his cousins said the war on terror should be fought with peace.
Vivien Figueiredo, 22, said: "They should not be exterminating people unjustly which is what happened to my cousin Jean."
Ms Figueiredo described her cousin, a 27-year-old electrician, as an "extremely honest" person and said he had done nothing against the law.
She was one of four of the dead man's cousins - the others were Alessandro Pereira, Alex Pereira and Patricia Da Silva Armani - speaking at the London press conference.
They said they did not believe Mr Menezes, who had been challenged by plainclothes officers outside Stockwell, had vaulted the ticket barriers in order to evade them, nor that he had been wearing a heavy jacket, as was reported at the time.
Ms Figueiredo said police told her he was wearing a denim jacket and
had used his travel card to get through the station.
Mr Menezes' family said he had committed no crime
The family spoke passionately about Mr Menezes's innocence, saying he had never
been in trouble.
They urged the public not to forget him and not to let his death be wasted.
"What happened to him in this country was a great error and we do not accept the apology that was made to us," said Ms Da Silva Armani, 31.
The cousins also criticised the police's decision to allow one of the officers to go on a holiday with his family less than a week after Mr Menezes' death.
They called on the government to punish the officers involved.
A vigil to mark one week since Mr Menezes's death will take place at 1730 BST on
Friday in Parliament Square.
An inter-religious faith service will be held at Westminster Cathedral to
coincide with his funeral in Brazil.