The mother of a young girl decapitated by a sadistic nanny who brandished her head outside a train station shouting "Allahu Akbar" is appealing the verdict that the killer has a "psychiatric disorder".
Ekaterina "Katya" Mescheryakova is also demanding assurances that she will not be freed as soon as May or extradited to her homeland of Uzbekistan.
She fears that Gyulchehra Bobokulova, 39, could return to kill the rest of her family as she threatened during the investigation, according to court testimony.
The burka-clad nanny sent shockwaves around the world when she held aloft the bloody severed head of the four-year old child Anastasia - known as Nastya - at Oktyabrskoye Pol metro station in central Moscow.
She also threatened to blow herself up, shouting to bystanders: "I am a terrorist."
A Russian court absolved her of legal responsibility after ruling she had a "chronic psychiatric disorder".
In November last year, she was sentenced to compulsory psychiatric hospital for "forced compulsory medical measures".
Her condition is reviewed every six months, starting in May, when she could be released if she has been "cured".
But the mother is now disputing the diagnosis and appealing the verdict.
Lodging the appeal, she said that under a treaty the nanny could be extradited to her native Uzbekistan, where she might be released then return to Russia.
"My family cannot feel safe if Bobokulova in future finds me or my other child (a son), having arrived back in Moscow from Uzbekistan - because during the investigation she testified that she had an intention to kill our entire family."
She also claimed the verdict was "illegal and unfair" in absolving Bobokulova of criminal responsibility.
Further, she demanded to know which psychiatric hospital the killer is in, saying she has been denied this information, and whether official negotiations are underway to send the nanny to Uzbekistan.
She wants a reassessment of the paroxysmal paranoidal schizophrenia diagnosis, claiming that for two years living in her house the nanny was "sane" and "cheerful", before she became influenced by an alleged extremist from Tajikistan, becoming his second wife.
A Muslim, Bobokulova then began praying regularly but also followed news on military action in territories controlled by the Islamic State and became interested in a-Qaeda, she said.
Previous evidence showed that the nanny gave varying but lucid motives for her macabre actions.
She claimed that she wanted to avenge Vladimir Putin's military action in bombing Muslims because "he spilled the blood".
Bobokulova also said she strangled the child - before using a kitchen knife to sever her head - after hearing "the voice of Allah".
"It was a male voice that was ordering her to kill the girl," the court heard.
She also told how she had watched watched beheadings by militant groups on her computer.
"I saw online how they were cutting off heads. This hatred.
"There was a voice in my head: 'Do it to the girl'."
She said: "I saw how they cut off heads and I did it.."
She was also said to be "angry" because her Tajik lover, Mamur Dzhurakulov, who she married under Sharia Law, already had a wife.
This fact "pushed her towards the crime".
Her teenage son Rakhmatillo claimed that his mother became radicalised after meeting 48 year old Dzhurakulov.
She told him of her plans to go to Syria and to join ISIS, the son said.
"She told me that she wanted to do the Hajj and move to Syria because she would be able to wear a hijab, live in line with Sharia Law, study Islamic law," he said in March.
Investigators had sought to link her to radical Islamic groups but decided there was no evidence for such a connection.
After the killing on 29 February last year, major state-run TV channels refused to cover the case as "probably too monstrous to be shown on television".
And Putin's spokesman ahead of the psychiatric diagnosis and trial told reporters: "I'm not an expert or a judge but it is obvious that we are definitely talking about a woman who is mentally unsound."
Before the verdict she boasted to a journalist: "I know everything.
"I have to undergo compulsory treatment for three years and then they will let me go."
Her lawyer Alexander Arutyunov said: "In principle, she could be treated for a very long time, even indefinitely.
"But every six months a commission of psychiatrists will examine her.
"And if this commission comes to the conclusion that she has been cured, it is possible to stop the compulsory medical treatment.
"If she is cured and is not dangerous for society any longer, she will be released."