Officers are believed to have placed the bugs after Nigel Gregory was deliberately sent out of the Island on a ‘bogus’ visit to Northern Ireland.
Mr Gregory, who was a detective-constable, was the focus of the hi-tech surveillance operation lasting several months following allegations that he misused information gathered from people entering the Island.
As a special branch officer he was responsible for keeping watch for terrorists and other serious criminals at the Airport and the Harbour.
Secret CCTV footage caught him taking a woman into the Special Branch offices, which should be strictly off-limits.
It was after these images were recorded that Mr Gregory, who had 25 years of experience, including time in the drugs squad and as a police motorcyclist in the force, was arrested under the anti-terrorism law and suspended in July last year.
Mr Gregory, who was 43 years old when he was arrested, appeared at a disciplinary hearing before police chief Graham Power last week and was ‘required to resign’.
No decision has yet been made on whether he will face criminal charges.