This is the chilling moment of nurse serial killer Lucy Letby, who was asked about the spate of deaths of babies on her watch in her first police interview – as footage also emerged of her arrest .

The 33-year-old, who was today convicted of seven murders, is being questioned by police over rising deaths at the Countess of Chester Hospital, where she worked.

She says: “They told me there had been many more deaths and that I had been linked as someone who had been there for many of them.”

When asked if she had any concerns about the increased mortality, the nurse replied ‘yes’.

Letby then adds: “I think we were all just noticing as a team in general, the nursing staff, that this was an increase from previous years.”

Letby was questioned by police in July 2018, when she admitted she had been confronted with the rising number of babies dying under her care

Letby – dressed in a blue hoodie with strings covered in pink sequins – is taken from her home in handcuffs after being arrested by Cheshire Police

Following her sentencing today, police have also released footage of when Letby was finally arrested after her killing spree.

The video shows Letby – dressed in a blue hoodie adorned with pink sequins – answering the door to officers and saying “yes” when asked to confirm her name, before calmly letting them in.

She is later seen being taken handcuffed to a waiting car, where she warns officers to be careful as she had recently undergone knee surgery.

The NHS neonatal nurse has preyed on babies small enough to fit in the palm of her hand by injecting air into their bloodstream or feeding tubes, causing them to collapse and die.

She attacked two sets of twins and murdered two boys in a series of identical triplets less than 24 hours apart, with the third only surviving because his parents begged another hospital to take him.

Letby wept in the dock as the guilty verdicts were handed down. Her mother burst into a series of anguished sobs that continued even after she left the court.

At one point she cried out, “You can’t be serious. It can’t be fair.”

After each murder, Letby appeared “lively and excited”, offering to bathe, dress and take pictures of her victims’ bodies.

Letby gets in the police car – telling the officers to be careful as she had just had knee surgery

The moment Letby first opens her door to the police and says ‘yes’ when asked to confirm her name

Detective Sergeant Who Interviewed Lucy Letby Reveals The Killer Was ‘Cool And Unemotional’

Lucy Letby was ‘cool’ and devoid of ’emotion’ when speaking about the killing of babies in her care, the policeman who questioned her told the Mail today.

Detective Sergeant Danielle Stonier said the interrogation of Britain’s most prolific child killer was at times “surreal” and “intense”.

And she said she believed the calculating neonatal nurse only spoke to the police because she wanted to know what evidence they had against her, so she could try to outwit them.

“The Lucy Letby you saw in court was the Lucy Letby I interviewed,” Ms Stonier said. “His tone, his approach to answering questions, even the pauses, were pretty much the same.

“Some of the evidence and statements that we presented to him were really very detailed, the allegations were horrific.

“Some people were knocking over tables, throwing chairs, slamming doors and saying, ‘Listen, you have to go talk to so-and-so. I shouldn’t be here, that’s completely wrong’ (but) Lucy Letby was calm, she was pretty cool, she answered the questions, she was confident with the answers. She spoke but there was no emotion.

Although her motive is unclear, the prosecution suggested she had a “thrill” at “playing God”. Inside her messy, childish house, the police found a post-it note on which she had scribbled: “I’m evil, I did this.”

In one case, a senior nurse on duty had to repeatedly tell Letby to come out of a room where a grieving couple was spending their last moments with their infant son.

The father said Letby came with a ventilated basket and said to them, “You said goodbye. Do you want me to put it here? This prompted his wife to tell him, “He’s not dead yet.

The nurse, a seemingly ‘clumsy’ and ‘innocent’ young woman who had Disney stuffed animals on her bed, was also found guilty of attempting to murder seven newborn babies between June 2015 and June 2016 by poisoning them with insulin, overfeeding them with milk, altering their breathing tubes or attacking them. Four were left with lifelong brain damage.

The killer found different ways to inflict indescribable and inhuman levels of pain, with some of his victims letting out tortured screams that experienced pediatricians had never heard before. Many had to take time off work to recover from the trauma.

She got away with her killing spree despite the consultants repeatedly trying to tell managers about the wave of deaths under her watch.

Dr Ravi Jayaram, a TV doctor who appears on This Morning, said he was ‘turned away’ by nurses after his email warning about Letby prompted the response: ‘He is unlikely anything will happen, we’ll see what happens”.

The families of the killed and injured babies have demanded a public inquiry into how Letby was able to murder and maim babies for so long.

Neither parent had any idea their children had been victims of crime until they were visited by the police up to three years later.

Police are currently reviewing the care of all babies who have been admitted to neonatal units at Countess of Chester Hospital and Liverpool Women’s Hospital – where Letby also completed two training spells in 2012 and 2015. They will then consider whether they need to look into all the cases in more detail.

Letby in a handout photo released by Cheshire Police today