LONDON — Former News of the World editor Rebekah Brooks moved from the defendants' dock to the witness stand Thursday, arguing her innocence of phone-hacking charges in public for the first time.
Almost four months into a court case that has put Britain's tabloids on trial, Brooks began her defense, claiming that while editor she had never even heard of the private investigator who has admitted prolifically hacking phones on behalf of her underlings.
Brooks, the former chief executive of Murdoch's British newspaper unit, spoke in a quiet and occasionally hesitant voice and gestured frequently with long-fingered hands as she began what is expected to be weeks of testimony.
She said that, as editor of a Sunday tabloid with a staff of 170, she had not known that phone hacking was taking place.
"It's impossible for an editor to know every source of every story," Brooks said.
She said the News of the World's investigations unit, depicted by prosecutors as a hotbed of illegal activity, used subterfuge and "investigative tools ... but always with a very good public interest."
As for Glenn Mulcaire, the private eye who has pleaded guilty to eavesdropping on voicemails, "I never heard his name."
At the start of Thursday's session Brooks was acquitted of one of five charges she had faced — a claim she illegally paid an official for a photograph of Prince William in a bikini.