A double murderer may be linked to six other murders, according to a former detective who arrested him.
Christopher Halliwell was jailed on Friday for the 2003 murder of Becky Godden, having already been convicted of killing Sian O'Callaghan in 2011.
Speaking on BBC Radio 4's Today programme, ex-detective Steve Fulcher said Halliwell told him "police want to interview me about eight murders".
Mr Fulcher said he "concluded" it meant Halliwell was linked to other cases.
"There's no question, from all the information I gathered when I was running this inquiry in 2011, that he has committed other murders," he added.
In particular, he suggested Halliwell could have been involved with the disappearance of Linda Razzell who was last seen on her way to work in Swindon in 2003.
The 41-year-old mother of four's husband Glyn was later sentenced to life in prison for her murder.
Image copyright Wiltshire PoliceMr Fulcher said police were aware Halliwell had a "direct relationship" with Mrs Razzell.
However, he denied newspaper reports he had suggested Halliwell could be linked to the disappearance of missing York chef Claudia Lawrence.
The Sunday Express reported Mr Fulcher as saying Ms Lawrence's case "fitted Halliwell's behaviour".
But North Yorkshire Police said they were "not aware" of any evidence to link Halliwell to Ms Lawrence. She vanished in York in March 2009.
Wiltshire Police are also not linking Halliwell to any other murders but were due to liaise with other police forces over cases.
Det Supt Memory said: "It is fair to say that there may be other victims as there is an eight-year gap, however I am not linking him to any other investigation at this time."
Mr Fulcher resigned from Wiltshire Police in 2014 after being found guilty of gross misconduct for failing to follow the proper procedures when arresting Halliwell in 2011.
During the investigation into the disappearance of Ms O'Callaghan, Halliwell offered to take police to "another one" and led Mr Fulcher to a field in Gloucestershire where Becky Godden's remains were found.
The evidence gathered by Mr Fulcher was ruled inadmissible as he had not cautioned Halliwell.
Ms Godden's mother, Karen Edwards, has praised Mr Fulcher for his actions but he has been repeatedly criticised by her father John Godden.
The 52-year-old taxi driver from Swindon was jailed for life in 2011 for killing Ms O'Callaghan, whose body was found in Uffington, Oxfordshire.
Becky Godden's remains were also discovered in 2011, in a field in Eastleach, Gloucestershire.