Britain's youngest female murderer: Girl, 12, mutilated teen in stabbing frenzy 25 years ago - but did she act alone?

It was a crime that shocked the country.
An 18-year-old returning home from an evening out at a local nightclub targeted at random and stabbed multiple times before her killer dumped her body.

Due to the ferocity of the attack on trainee hairdresser Katie Rackliff, police were certain they were looking for a male killer.
But they were in for a terrifying surprise - the sadistic killer was 12-year-old Sharon Carr.
It would be four years before she was brought to justice, by which time she had stabbed a fellow pupil at her school who was lucky to escape with her life.

While awaiting trial, she was sent to an assessment centre where she tried to strangle two members of staff.
Convicted of wounding her young victim, she was sentenced to be detained at Her Majesty's pleasure.
Four years after Katie's murder, evil Carr must have believed she had got away with it because she started boasting about her knowledge of the crime.
At Bulwood Hall young offenders institution where she was being held, staff alerted police after Carr began talking about the killing of Katie on the telephone to her friends and family and also writing about it in her diaries.
She also began to give details of what she had done to a prison officer, on whom she had developed a crush, as well as talking about it to a probation officer.
When they investigated they discovered Carr had written a shockingly graphic detailed diary which revealed how she exulted and revelled in the murder of Katie, a stranger until the night of the killing.
A new documentary examines the killing afresh and notes inconsistencies which indicate Carr may not have acted alone - something the judge questioned at the time of sentencing.
In fact, even after two-and-a-half decades people were too upset or too scared to speak about the crime. Fifty individuals turned down the chance to contribute.
A quarter of century on from her horrific crime, it is tempting to be more sympathetic towards Carr, who, like her victim on the night she died, never stood a chance.
Born in Belize, she grew up surrounded by domestic violence.
While most children are nurtured and loved by adults in their lives, Carr had the opposite treatment.
Her father was a violent drunk and her mother had an explosive temper. On one occasion, she poured pepper on her daughter's vagina as punishment.
When her daughter was very young, Carr's mother met George Carr, a member of the Royal Army Medical Corps serving in Belize and the family moved to England, settling in Camberley, Surrey.
At first things went well for youngster, who was described by one teacher as "charming and refreshing" and played in the school basketball team.
But the good behaviour and educational promise did not last.
Carr became violent in class and at aged just 11 started to smoke cannabis on the deprived Old Dean estate where she lived.
Her mother's marriage collapsed and she was briefly fostered, but after a month she returned to her mother's home, where she was exposed to more domestic violence.
Following her conviction for murder in 1997, the Daily Mail carried an interview with Mr Carr in which he detailed one horrific incident.