The U.K., unlike the United States, has no First Amendment -- but it does have a tradition of rough-and-tumble tabloid journalism. Glenn Mulcaire and Clive Goodman, two former News of the World employees, have previously served prison sentences for hacking into the phones of employees of the royal family.
"Working for the News of the World was never easy. There was relentless pressure. There was a constant demand for results," said Mulcaire, a private investigator, in a story from The Associated Press. Today Mulcaire asked reporters for privacy -- even as he conceded he had been hired to invade others' privacy.
Several of Britain's more restrained papers -- including the Times of London, which, like News of the World, is a Murdoch property -- voiced outrage in editorials today, many calling on Brooks to resign.
"There is a lot that is not yet known about this case," said a Times editorial, "but this much we do know: this is beyond reprehensible."
ABC News' Lama Hasan contributed to this story. Additional information from The Associated Press.