The family of a Brazilian man shot dead by armed police officers at a London subway station say they are considering legal action. Jean Charles de Menezes, 27, was killed as part of the anti-terror operation launched following last Thursday's attempted bombings of the London transit system. However police said on Saturday Menezes "was not connected" with the attacks. British Foreign Secretary Jack Straw was due to meet his Brazilian counterpart Celso Amorim -- in London for a scheduled United Nations conference -- on Monday to apologize for the incident. Asked if his family was taking legal action, Menezes' cousin Alex Alves Pereira said the police had to pay for the mistake. "They have to pay for that in many ways, because if they do not, they are going to kill many people, they are going to kill thousands of people," Pereira told BBC television. "They just kill the first person they see, that's what they did."