Police are searching the garden of double-murderer Christopher Halliwell for more bodies, it is understood.
Evil Halliwell was last year convicted of fatally stabbing and strangling Becky Godden, 20, in 2003 and handed a full-life jail term at Bristol Crown Court.
He had already been serving a life sentence for killing a second woman, Sian O’Callaghan, after abducting her as she left a nightclub in 2011.
During the last trial the detective leading the investigation, DS Steve Fulcher, told a jury that Halliwell led him to believe he had killed more people.
He told Bristol Crown Court that Halliwell couldn’t remember the year he had killed Becky, saying it “led me to conclude that there were other victims”.
Now it is understood police are excavating two gardens outside his former home in Swindon, Wiltshire, in a hunt for more bodies.
The force said the investigations in Broad Street are based on new information and they are not sure if they’ll find anything.
It is understood police have never searched the exterior of the property before and say the search is unrelated to the current owners.
A spokesperson for Wiltshire Police said: “Specialist officers are currently carrying out excavation work within the gardens of two properties within Broad Street as part of an ongoing investigation being carried out by the Brunel Major Crime Investigation Team.
“This relates to intelligence that the force has received. We are unable to comment further at this time.”
Sandra Brewin disappeared from her parents’ home in 1994 aged 21 just months after she became penfriends with a man who was in prison in Oxfordshire.
Other unsolved missing person cases in the area include college worker mum-of-four Linda Razzell, 41, who disappeared from Swindon in 2002.
The whereabouts of Vietnamese immigrant Thi Hai Nguyen, 20, have also been unknown since she went missing from her temporary home in Swindon in June 2005.
Chief Constable Mike Veale, speaking on BBC Points West, said last year: “The speculation is a disgrace.
“The speculation has caused devastation and trauma and the speculation is inaccurate. There are no links to any other murders in this country.”
“This speculation is not helpful and is very distressing to the families involved.
“At this time Wiltshire Police has not uncovered any links between Halliwell and any other murders across the country.”