Mr Harper, who led the investigation into historical child abuse which focused on the Haut de la Garenne children’s home, issued the warning in a letter also sent to the media.
In a statement to the States two weeks ago, Senator Ian Le Marquand said that he believed there must have been a leak which led to a News of the World journalist being found in bushes at the former children’s home.
In his letter to the Home Affairs Minister, Mr Harper said: ‘I have been instructed to counsel you against repeating these falsehoods without the protection afforded to you in the States.’
