London ? British Prime Minister Tony Blair offered his “deepest regrets” Thursday to Brazil’s president and to the family of an innocent Brazilian electrician shot to death by police who suspected him in July terror attacks on the capital’s transport system.

Brazilian President Luiz Inacio Lula da Silva’s meeting with Blair was clouded by lingering anger over the slaying of Jean Charles de Menezes and demands from the victim’s family that London’s police commissioner resign.

Silva said he trusted British authorities to investigate the death and “do what needs to be done.”

Menezes was shot in the head at close range by police after they tailed him into a subway car July 22, the day after failed bombing attacks on the British capital’s transit system.

Those attacks came two weeks after the July 7 suicide bombings that killed 52 commuters.

Police, who have apologized for the killing, said later they had mistaken Menezes for one of the suspects in the failed attacks.