Detectives will quiz the evil lovers who murdered wheeler dealer Lennie Fulbirg to try to find out what they did with his body.

Senior officers from the murder inquiry will visit Graham Haylett and Tracey Cameron in prison in the next few weeks.

They will ask the cold-blooded killers how they murdered the 49-year-old father-of-12 and what they did with the parts of his body which are still missing.

Cameron, Mr Fulbirg's former lover and mother of his child, and Haylett, both aged 40, were today starting life sentences for murdering him, chopping him up, burning the body and dumping his remains on the moors so they could continue their relationship unopposed.

The jury of six men and six women at Leeds Crown Court unanimously convicted the pair yesterday of murder after a six-week trial.

The judge, Mrs Justice Cox, told them that she had not seen a single indication of any remorse from either of them.

She ordered that each spends at least 20 years in prison and that they remained on licence for life after their release.

The skeletal remains of Mr Fulbirg's torso, which had been chopped up and set on fire, were found on Oxenhope Moor, above Keighley, but his head and limbs have never been found.

The senior investigating officer, Detective Superintendent Phil Sedgwick, said he hoped, for the sake of the Fulbirg family, who live in Buttershaw, Bradford, that the killer couple would reveal the final answers to the horrific murder.

Det Supt Sedgwick said: "Some time in the next few weeks, officers from the inquiry team will speak to both defendants in an attempt to locate Mr Fulbirg's remains and establish how he was killed.

"On behalf of the Fulbirg family I hope they will co-operate, but it is up to them. We arrested them twice, held them in custody for a number of days and interviewed them at length on a number of occasions and they have never told us.

"We can't force them, it is a matter for them. They might just tell us, but it may be we will never find out. If they don't tell us where Lennie's missing remains are, the inquiry is finished. We are not looking anymore and we won't keep going back to interview them."

Det Supt Sedgwick said that when the bones were identified police had an idea who was responsible and there had never been any other suspects.

He said: "It was a pre-meditated, cold-blooded and calculated crime and they have got what they deserved. The sentence the judge gave reflects the crime.

"They thought they had got away with it, but they didn't. With advances in science, we have a fresh look at unsolved crimes. You can never get away with something."

Det Supt Sedgwick said he had known Lennie Fulbirg and he was "no angel".

But he added: "The point is this is not the Wild West and no-one has the right to do what they did."

He said it had been the most difficult case he had ever had to investigate.

"It was like being involved in an Agatha Christie novel. Because it happened ten years ago it was more difficult. Records had been destroyed, things had gone missing and people's recollections were more hazy. You try to do your best and luckily on this occasion our best was good enough.

"We had a first class team of officers who sifted through the evidence, and all the witnesses we traced had the integrity, courage and honesty to come forward and give evidence, particularly the women from the refuge in Halifax.

"The family has already buried Lennie and now the defendants have been convicted the family can close that chapter of Lennie's life. They will never forget but at least they can try to move forward."

He said it had taken three painstaking years to bring the case to its successful conclusion, which had happened almost nine years to the day since Lennie's bones were found.

Cameron and Haylett stood impassively in the dock as first the verdicts and then the sentences were announced.

Cameron, of Dunsford Avenue, Bierley, had been smartly dressed in dark suits throughout the trial, with her long hair tied neatly back. Haylett was living at Lansdale Court, Holme Wood, at the time of the murder but later moved to Batley.

Sentencing them Mrs Justice Cox said it would probably never be known how and where Mr Fulbirg met his death but it was a brutal and chilling murder, carefully planned.

"No doubt you thought you'd got away with it, you nearly did," she said.