JULIE Hogg, a 22-year-old pizza delivery girl and single mum, was murdered in 1989 by Billy Dunlop in Billingham, Stockton on Tees.
Dunlop, now 59, was finally jailed for his crimes in 2006 after the double jeopardy law was repealed — here's everything you need to know.
Who was Julie Hogg?
Mum-of-one, Julie Hogg, 22, worked as a pizza delivery girl in her hometown of Billingham, Stockton on Tees.
She was a single mum to three-year-old Kevin at the time of her murder.
Kevin had been staying with Julie's mother Ann Ming when Julie disappeared on November 16, 1989.
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Following her disappearance in November of that year, police originally treated the case as a missing persons.
However, three months later her horrified mum Anne discovered Julie's partially decomposed and mutilated body behind a bath panel in her home — despite 29 officers having already searched the house.
Julie's body was found to have been subjected to "violent sexual assault".
Devastated and Anne said finding her daughter's body was so traumatising it "verges on the indescribable".
she said: "To this day, I can still smell the putrefied smell which was our daughter.
"As a family, we are damaged beyond repair and will never be the same again as Julie will never return home.
"The love we feel for Julie means it is we who are serving the life sentence."
What happened with her murder enquiry?
The horrific discovery sparked a murder inquiry and about 40 officers from Cleveland Police were assigned to the case.
There were initially several men suspected of killing Julie, including Billy Dunlop.
The evidence against him included fingerprints on Julie’s keys, which were found under the floorboards at a house where Dunlop had been living.
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Dunlop went to trial twice in 1991 and was found not guilty of Julie's murder following an inconclusive verdict from the jury.
Ten years later Dunlop — who was in prison for an assault on another woman — confessed to a prison guard that he had murdered Julie, and bragged he would never go down for it due to the double jeopardy law.
He was jailed for six years for perjury.
But the double jeopardy law was repealed by the Labour government in the UK in 2005 after senior judges and legal figures called for more nuanced rules to deal with complex crimes.
Dunlop was jailed for life in 2006 for the murder of Julie Hogg, with a minimum tariff of 17 years.
Who is Julie Hogg's mother Anne Ming?
Anne Ming, 77, is a mother and grandmother who worked as theatre nurse at Middlesbrough General Hospital until her retirement.
Anne spent 15 years working to overturn the 800-year-old double jeopardy law and bring the killer of her daughter to justice.
In 2007 she was awarded an MBE for service to the criminal justice system.
Speaking exclusively to the Sun about the remarkable case, ahead of a new Channel 5 documentary, The Incident Room, Ann said: “When you get the conviction, the first 24 hours you’re euphoric.
"It doesn’t actually make a difference because your loved one isn’t coming back but you have that closure for the crime.”
Speaking about making the grim discovery of her daughter's decomposing remains, she added: "She was there for three months in that house and 29 police officers were in and out of that house so it's strange that they never found her.
But she insists: “I’m glad I found her. When she was missing, the not knowing was awful. If I’d not found her, it would have been worse.”
Ann also recalls how Julie's son Kevin, now 37, was with her in the flat when she found Julie.
She said: “I had to tell his dad to take him downstairs.
“He would cry all the time for his mam. We didn’t tell him the truth in the beginning.
"We told her she slipped in the bath and hit her head. I thought it was the right thing to do. You do what’s best at the time.”
And speaking about Billy Dunlop, she added: “He was bragging in pubs about how he’d killed our daughter and got away with the perfect murder.
“I was incensed.”
