A killer taxi driver told police he would "resolve the matter" of a sex worker he is accused of murdering if they did not pursue him for other crimes, a court has heard.
Christopher Halliwell, 52, is alleged to have strangled Becky Godden, 20, and buried her in Oxo Bottom field in Eastleach, Gloucestershire, in 2003.
He is currently serving a life sentence with a minimum term of 25 years after admitting stabbing and strangling officer worker Sian O'Callaghan, 22, in 2011.
Bristol Crown Court has been told Halliwell initially confessed to strangling Miss Godden and led police to the exact spot of her remains.
Halliwell has since pleaded not guilty to murder and is representing himself at his trial.
Police arrested Halliwell, formerly of Ashbury Avenue, Swindon, Wiltshire, on suspicion of Miss Godden's murder on February 18 last year.
The jury heard Halliwell underwent three interviews at Worcester police station and appeared to offer police a deal to resolve the case.
He told officers: "If I get charged with this and found guilty, I'll get a natural (a whole life order). That's it. Curtains, over.
"I mean, I'm not being funny. I'm 50 now, but 25 years to go so chances are not looking good as it is.
"If I wrap this up in the next few hours, any other charges against me that will be brought, that's bits of past.
"I think you probably know about various things in the past, there's car thefts, break-ins, bits and pieces, some more serious.
"Will that, will clearing this up be enough to stop everything else? If I can clear this up in the next few hours, will everything else be forgotten?
"I can resolve the matter but I don't want you coming back every couple of years, every five years, every 10 years whatever with this, with this.
"I'm sick of it. If it goes to court and I'm found guilty, that's it, they're locking me up and throwing away the key. I'm under no illusion, I'm not stupid so be that it."
During the interviews, Halliwell was handed a letter by Detective Superintendent Sean Memory stating that he was not aware of any other investigations.
Halliwell asked for the letter to be rewritten, adding: "There aren't any outstanding crimes that are as serious as murder without doubt."
He later was asked a series of 31 questions about Miss Godden's case and replied "no comment" to each one, the jury heard.
The court was told Halliwell called his daughter Natasha from prison at 10.23am on February 22 and spoke to her about the interviews.
"On Wednesday I was taken out of here and rearrested for Becky," Halliwell said in the phone call, which was recorded.
"I spoke to Detective Superintendent Sean Memory, the bloke in charge of the case.
"I said 'I will help you if I can but I want something in return'.
"They gave me a bit of paper that was way, way, way short of what I asked for but I have it in writing that the police don't want me for anything else.
"I got it off my chest. As far as I am concerned, I have offered them the goose that lays the golden egg and they have let it fly away.
"I'm not going to say anything without any safeguard for you lot."
Halliwell is said to have described himself as a "sick f*****" to Detective Superintendent Steve Fulcher of Wiltshire Police in March 2011.
At the time, he was under arrest for kidnapping Miss O'Callaghan and was standing in Uffington, Oxfordshire, close to where her body was found.
The jury heard Halliwell then directed officers to Oxo Bottom field in Eastleach, where Miss Godden's remains were discovered.
Prosecutors allege that Miss O'Callaghan and Miss Godden disappeared from outside nightclubs in Swindon after getting into Halliwell's taxi.
The trial continues.