VALDO Calocane's "lenient" sentence could be reviewed - after victims' families blasted he "got away with murder".
Twisted knifeman Calocane killed Grace O'Malley-Kumar and Barnaby Webber, both aged 19, and 65-year-old Ian Coates in a rampage across Nottingham.
Calocane, 32, has been been locked up in Ashworth high-security hospital after pleading guilty to manslaughter by diminished responsibility.
This means he will not be released while he continues to pose a risk to the public, which could be for the rest of his life.
Prosecutors ruled that Calocane could not be held fully responsible for his actions because of his paranoid schizophrenia - accepting his manslaughter plea rather than pressing for a murder conviction.
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But his sentence could now be referred to the Court of Appeal after the attorney general received a complaint saying it was too lenient.
Attorney General Victoria Prentis, the government's top lawyer, now has 28 days to decide whether to refer the case to appeal judges.
It is not known who made the complaint to the attorney general, but anyone can ask for a review.
Treasury minister Gareth Davies told Sky News: "I'm pleased that a sentence has been handed down which ensures that this perpetrator will be locked up for the rest of his life.
"There is a process in place to ensure that a referral can be made to the Attorney General.
"It's important that agencies conduct a thorough review of themselves and to assess what could have been done differently if that's the case.
"In any case, the Attorney General can review the outcome and the sentence. It is open to anybody to do that."
Labour leader Sir Keir Starmer backed the attorney general's review of the sentence.
Speaking on This Morning, he said: "As far as the sentence is concerned, obviously there are mental health issues in this particular case.
"The Attorney General has got the power to review it.
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"I think that probably makes sense and have it double checked by the Court of Appeal."
It comes as a chief constable was today accused of hiding over the force’s failure to stop Calocane - despite being the country’s top cop on murder.
Nottinghamshire Police Kate Meynell has remained silent on the force’s failure to stop the triple killer despite one of her officers publicly being slammed by the families of Calocane's victims.
Meynell is the lead for homicide on the National Police Chief’s Council - making her one of the country’s top authorities on the crime.
The force has made no comment since it was accused of "letting down" victims of the monster as he was caged yesterday.
She was blasted today by former Met Chief superintendent Dal Babu, who said cops should have intervened.
He said: “You would have thought the Chief Constable would have made herself available over this.
“She is ironically the lead for homicide on the National Police Chief’s Council.
“I think the police should have intervened and if he had been arrested that would have triggered further issues.”
'RAILROADED'
Yesterday the families of Calocane's victims blasted prosecutors' decision to accept his manslaughter plea rather than press for a murder conviction.
Speaking outside Nottingham Crown Court, Barnaby Webber's mother Emma said: "True justice has not been served today.
"There is so much more to say and clearly serious questions regarding this case and events leading up to this monster being out in society.
"But for today, our darling son, his dear friend Grace, and a wonderfully kind grandfather, Ian, have been stolen from us for ever.
"They have been let down by the very system that should have been protecting them.
"The CPS did not consult with us as has been reported. Instead, we have been rushed, hastened and railroaded."
She added: "We were horrified. At no point in the previous five and a half months were we given any indication that this could conclude in anything other than murder.
"We trusted in our system, foolishly as it turns out. We do not dispute that the murderer is mentally unwell and has been for a number of years.
"However, the pre-meditated planning, the collection of lethal weapons, hiding in the shadows and the brutality of attacks are of an individual who knew exactly what he was doing.
"He knew entirely that it was wrong but he did it anyway."
'HORRENDOUS CRIME'
Meanwhile, Ian's son James Coates blasted cops and the "failed" system for the outcome.
He said: "This man has made a mockery of the system and he has got away with murder.
"This man is a killer - murder was the only thing he cared about and he fulfilled this in horrific fashion."
He added: "My heart from the very beginning has gone out to the families of Grace and Barnaby.
"The letter of the law was once considered the most important rule to live and abide by, put upon us to make the country a fair and safer place.
"Now it is just a cautionary tale where this calculated, cold, and brutal killing spree can be reduced down to something that falls in the same sentencing restrictions and guidelines as that of death by dangerous driving."
Grace's father Dr Sanjoy Kumar said her family have never questioned Calocane's diagnosis of paranoid schizophrenia.
But the heartbroken father said there were "missed opportunities" to "divert Calocane's lethal calls" that will "forever play on our minds".
He said: "We will look for answers regarding missed opportunities to intervene and prevent this horrendous crime."