VT - maybe one place to start would be to read the history of Mary Bell who

'(born May 26, 1957 in Newcastle upon Tyne, England) was convicted in December 1968 of the manslaughter of two boys, Martin Brown (aged four years) and (with her friend Norma) Brian Howe (aged three years).
Bell was ten years old at the time of one of the killings, and eleven at the time of the other.'

On 17 December 1968, Norma was acquitted but Mary was convicted of "manslaughter due to diminished responsibility", the jury taking their lead from her diagnosis by court-appointed psychiatrists who described her as displaying "classic symptoms of psychopathology". She was sentenced to be "detained at Her Majesty's pleasure": effectively an indefinite sentence of imprisonment.

Mary Bell was housed at the Red Bank Special Unit from February 1969 until November 1973 when she was transferred to the womens facility at Styal prison.

She was released May 14, 1980, and stayed in Suffolk
After moving back in with her mother, she met a young man and became pregnant.
There was great concern over whether the woman who had murdered two children should be able to become a mother herself, yet she fought for the right to keep her child, which was born in 1984.
She was allowed to keep the child, who was technically a ward of the court until 1992

Her daughter did not know of her mother's past until Bell's location was discovered by reporters and she and her mother had to leave their house with bed sheets over their heads.

The daughter's anonymity was originally protected until she reached the age of 18. However, on 21 May 2003, Bell won a High Court battle to have her own anonymity and that of her daughter extended for life.
Any court order permanently protecting the identity of someone is consequently known as a Mary Bell Order.

Mary's own childhood was 'a nightmare of abandonment and drug overdoses.' which were probably administered by her mother.

much more about Mary's childhood etc here