The leader of the firearms team that shot innocent Brazilian Jean Charles de Menezes choked with emotion today as he defended his officers in court.
He told the Old Bailey that despite what happened he was "very proud" of them.
The officer, codenamed Ralph, said police had been prepared to risk their lives pursuing the man they believed was a suicide bomber into the Underground.
He was giving evidence at the trial of the Metropolitan Police, which is accused of a "catastrophic" series of errors leading up to the death of Mr de Menezes. The force denies a single charge under health and safety laws.
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