Rachel Manning had been to a 1970s-themed fancy dress party and Chicago's nightclub with boyfriend Barri White before going missing in the early hours of 10 December 2000.

The teenager was found dead in undergrowth at Woburn Golf Club two days later. She had been strangled and her face disfigured with a steering lock, which was located 500m (546 yards) from her body.

The story of Wigan teenager Louise Sellars, who vanished in 1995. The next day, her body was found in a field near her home, leading to a hunt for a killer in Appley Bridge. 

The brutal murder of 17-year-old student Zoe Nelson in North Lanarkshire in 2010 - and the twists and turns of the trial that followed.

Melanie Road, 17, was murdered on her way home from a nightclub in Bath in 1984. She had been out with her boyfriend and friends, but Melanie had been sexually assaulted and brutally stabbed 26 times on her way back home. A milkman found her body the following day.

After multiple lines of enquiries and arrests, the police weren't able to find the killer, and despite recovering a large amount of DNA evidence at the scene, the case went cold. Over the next 30 years, the police continued to review the case and check the DNA database for any matches but no real breakthrough.

There were 100s of potential suspects who were checked against the database but not a match. The real breakthrough came in 2014 when the DNA database returned a familial match, leading the police to married father Christopher Hampton. This man had brutally murdered Melanie on the night in 1984 and had been at large for 30 years.

Pennie Davis'body was found with multiple stab wounds in a field where she rode her horse in the village of Beaulieu on 2nd September 2014. The case centered on Mrs. Davis' relationship with Benjamin Carr, 22, the son of her estranged partner, who had "lasting hate and anger" towards her.

Mrs Davis had reported Carr to police for two sexual assaults, which he denied and the matter was not taken further by police. Animosity resurfaced in 2012, however, when Mrs. Davis found out Carr's father was to re-marry and Davis threatened to disrupt the proceedings by going public with her allegations.

Carr hatched a plan to pay career criminal Justin Robertson £1,500 to 'silence her for good.' Police believe Robertson intended to scare Ms. Davis, but when she challenged him and removed his balaclava, he panicked, realised she could identify him and killed her. Both Carr and Robertson were charged with the murder and found guilty.

Vikki Thompson went missing in Ascott-under-Wychwood, Oxfordshire, while walking her dog on 12 August 95. The dog returned home without her, raising the alarm. After a frantic search, she was found alive but badly beaten - she died 6 days later.

Mark Weston emerged as the prime suspect, the Police set about building a case, with enough evidence to charge him with the murder. When the case went to trial, Weston was found not guilty by the jury.

A decade after the murder of Vikki Thompson, the double jeopardy law was changed in 2005, allowing a person to be tried for the same crime twice; the Police decided to look at the case again.

Weston's boots were resubmitted for testing and tiny traces of blood were found on the boots. The blood was a match to Vikki Thompson.

In 2009 Weston was arrested again and faced another trial, and this time he was found guilty. The first time that the double jeopardy legislation was used to secure a conviction.

Police found 72-year-old Jane Hings's body on Sunday, September 24th, 2017. DNA samples found at the scene found a match for then 25-year-old Craig Keogh, who was subsequently arrested. The police begin to build a case against Keogh and track his movements on the dates in question.

In July 1999, the remains of Wendy Upton were found in nearby woods; she was identified using dental records. Upton had been reported as missing nine months previously.

In April 2012, Dawn and George Kibble visited the flat of Dawn's sister Julie Davison, concerned for her wellbeing after repeated phone calls went unanswered. On arrival, they found Julie's lifeless body on the blood-stained floor of her kitchen. She'd been attacked, stabbed multiple times, and left for dead.