NEGLECTFUL parents, at risk of sexual exploitation, drug use and aggression.

Angela Wrightson's two schoolgirl killers –who cannot be named for legal reasons but were given the pseudonyms of "Olivia" and "Yasmine" by authorities yesterday – both had torrid childhoods, unveiled by the serious case reviews.

The older girl, Olivia, had had a particularly chaotic upbringing. The report into agency involvement with her in the run-up to Miss Wrightson's death made for confusing reading.

She had lived with her mother, then was taken into care at the age of five, then later lived with her father who told her her mother was dead.

In the two years leading up to her grisly crime her life was particularly chaotic, with a serious car accident which left her in hospital, accusations of historical sexual abuse against her father, the stabbing of her mother by a violent partner and several care placements.

And Yasmine – whose problems emerged as she started secondary school – was living with suspected alcoholic and drug user parents, and her father was reported to be violent towards her.

There were also concerns she had been coerced into underage sexual activity.

Unusually, yesterday's reports places much of the blame for the children's problems squarely at the door of their parents. Authorities tried to support both girls, and there were numerous interventions, but in both cases there were missed appointments as agencies tried to help the girls.

Yasmine's father was asked to attend parenting classes – he refused. Both girls were blamed for their poor behaviour rather than their parents taking "any responsibility" for their children having been neglected and seemingly abused at different times.

In court last year the girls seemed disassociated from what they had actually done that December night in 2014.

Their barristers at the time told the jury both were of limited IQ – something which did not come out in yesterday's report – and Olivia had attempted suicide numerous times, including once in the cells under the courtroom, saved by a quick-thinking member of court staff.

The picture painted then was of two deeply disturbed girls, both into heavy drinking, and Olivia's mother was said to have given her drugs earlier on the day of the murder and told her to "f***ing kill yourself".

Mental health experts were involved in her care and told her to draw pictures as a way of expressing her anger and helping to calm herself down after she had harmed herself, damaged property or attacked others.

In the week before the murder, she drew a disturbing image, [pictured], showing a smiling girl stabbing a man in the chest, blood spilling out, as tears pour from his eyes. When asked why she had drawn it, she said she didn't know.

She was also said to be on different kinds of drugs including codeine and amphetamines, and had taken strong tranquilisers on the night of Angela's death.

"Yasmine" in court was described as having had a more stable home life and was considered less aggressive. But her increasingly hostile behaviour led to authorities questioning what was happening at home.

Jamie Hill, QC, defending Olivia, told the court last year: "Two deeply troubled children found themselves in, some would say, an unpredictable world.

"It is difficult to rationalise what happened."

What made them torture and murder Angela will never be known.