Kim Dotcom has reiterated he had nothing to with the hacking of the Cameron Slater's communications, but revealed he did consider hiring a private investigator to monitor the blogger.
Computers belonging to Mr Slater - a right-wing blogger - were hacked in January, and some of the contents released in the book Dirty Politics by investigative writer Nicky Hager and on Twitter.
Mr Dotcom told Radio New Zealand's Morning Report programme he did not hack Mr Slater and he did not know who did.
“I have nothing to do with the hacking of Whale Oil, I'm not behind Whaledump, I've issued a press release some days ago about that and I can't believe these allegations are still live,” he said.
He revealed he considered hiring a private investigator to monitor Mr Slater, but changed his mind after realising the surveillance would be similar to that conducted on him.
Mr Dotcom said he had had been preparing legal action against Mr Slater, and his legal team had monitored the Whale Oil website to build the case, using only publicly available information.