He told the newspaper that not only did Coulson know of the phone hacking, but that he actively encouraged his staff to intercept the phone calls of celebrities in the pursuit of exclusives.
In a subsequent interview with the BBC he alleged that he was personally asked by his then-editor, Coulson, to tap into phones. In an interview with the PM programme he said Coulson's insistence that he didn't know about the practice was "a lie, it is simply a lie".

And now he's dead. Tomorrow Coulson appears before a parliamentary committee to deny that he knew anything about the phone hacking.

Correction, 19th July: Coulson is not appearing before the committee today. Today's business is with the Lord of the Flies and his fly-blown offspring. Also Knacker of the Yard and his sidekick.