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COPS have admitted they missed chances to arrest a knifeman before he unleashed a horror rampage that claimed the lives of three people on the streets of Nottingham.

Valdo Calocane was suffering from paranoid schizophrenia when he "brutally" stabbed students Barnaby Webber and Grace O'Malley-Kumar, both 19, in the early hours of June 13 last year.

Cops have admitted there were six missed chances to snare Valdo Calocane
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Cops have admitted there were six missed chances to snare Valdo CalocaneCredit: PA
He stabbed three people in Nottingham city centre in the early hours of June 13 last year
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He stabbed three people in Nottingham city centre in the early hours of June 13 last yearCredit: PA
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He also fatally knifed 65-year-old Ian Coates before stealing his van and ploughing into pedestrians.

Calocane has admitted three counts of manslaughter and three of attempted murder after hitting three other pedestrians with a van he stole from Mr Coates.

Ahead of his sentencing, Nottinghamshire Police said there were missed chances to stop Calocane.

Officers said there were a "number of occasions" between 2020 and 2022 where they had engaged with the triple killer.

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Here, we detail six chances that could have seen the knifeman snared before the horror.

We should have done more to arrest him

Rob GriffinAssistant Chief Constable

Spring 2020

In the spring of 2020 Calocane, 32, allegedly followed a female student to her accommodation and threatened her.

She was so terrified she jumped out of a window to escape.

During the same period, the university is understood to have made attempts to seek mental health care for the killer.

He was also arrested for criminal damage after smashing down a door at his flat.

Calocane was told to take anti-psychotic medication during which time he should have been monitored.

Summer 2020

He is then said to have broken into a neighbour's flat and threatened the occupants in the summer of 2020.

He was detained in hospital under the Mental Health Act.

Calocane, 32, appearing at Nottingham Crown Court
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Calocane, 32, appearing at Nottingham Crown CourtCredit: PA
Calocane attacked a housemate in a row over a dirty kitchen in January 2022
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Calocane attacked a housemate in a row over a dirty kitchen in January 2022Credit: Ian Whittaker

May 2021

Calocane visited MI5 in May 2021 and asked them to stop "controlling him".

A photo of him was taken at their London headquarters.

Calocane's barrister Peter Joyce KC said: "He (Calocane) tried to surrender to MI5 at their headquarters to try and stop them controlling him. That's not a concoction by him.

"There is a photograph taken by their systems at Thames House, saying 'please arrest me' - effectively 'stop controlling me'."

September 2021

In September 2021 he was sectioned under the Mental Health Act but on the way to hospital he assaulted a police officer.

Calocane later failed to attend court and a warrant was executed to gain access to his flat where seven months of untaken medication was found.

January 2022

Police were also called after Calocane attacked a housemate in a row over a dirty kitchen in January 2022.

Video shows Calocane holding Chris Young in a headlock just a year before the rampage left three dead.

Pals told how the violence broke out when mature student Calocane snapped at being asked to pick up dirty washing at the apartment.

The clip shows panicked Chris begging for room mates to "call police" and screaming "Valdo, get off me" during the attack at Rayleigh Park halls, in March 2022.

Officers attended the scene and escorted Calocane away - before university officials pushed for him to not face prosecution.

Instead the would-be killer was offered mental health support to allow him to finish his mechanical engineering degree, last summer.

February 2022

Finally, in February 2022 he attacked a flatmate and had his university halls of residence terminated, but faced no further action from the police.

Assistant Chief Constable Rob Griffin admitted: "We should have done more to arrest him."

The officer continued: "Because of the circumstance prevailing, at the time of the alleged assault, in my opinion it is highly unlikely that he would have received a custodial sentence.

"Of course, an arrest might have triggered a route back into mental health services, but as we have seen from his previous encounters with those services, it seems unlikely that he would have engaged in this process."

Calocane began his rampage just after 4am on June 13 as Grace and Barnaby walked back to their halls from a night out.

The killer pounced after lurking in the shadows and began stabbing at Barnaby with a dagger.

As he collapsed to the ground, Grace showed "incredible bravery" by attempting to fight the killer off.

She managed to shove raging Calocane into the road but this caused him to turn his attention to her instead.

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Calocane was then seen "calmly" walking away as he continued his gruesome spree when he came across Ian.

After stabbing the dad to death, Calocane stole his van and used it to ram three pedestrians – leaving Sharon Miller, Marcin Gawronski and Wayne Birkett injured.

Grace Kumar was killed in the horror attack
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Grace Kumar was killed in the horror attackCredit: PA
Barnaby Webber's body was found near Grace's after they were knifed
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Barnaby Webber's body was found near Grace's after they were knifedCredit: PA
School caretaker Ian Coates also died in the attack
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School caretaker Ian Coates also died in the attack
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