Here is the shocking moment in which a teenager accused of killing his girlfriend's four-month-old baby son called the police 'boring' during an interview.
Earlier this year, Carl Alesbrook, from Derbyshire, was found guilty of murdering his girlfriend India Shemwell's baby Elijah in January 2022, after the infant was discovered 'pale, limp and drowsy' in his mother's home.
Elijah is said to have suffered 'whiplash-type injuries' as well as multiple fractures to his limbs, and died three days after he was discovered.
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A court heard how on 2 January, Shemwell had phoned for an ambulance for her son, with prior video footage taken by the mother showing Elijah to be 'gasping for breath' as well as unresponsive.
The court also learnt that Shemwell would often leave Elijah in the care of then then 16-year-old Alesbrook, despite only knowing him for seven weeks prior to her son's death.
Footage released from the investigation reveals Alesbrook being initially questioned over the circumstances of Elijah's death, as well as clips taken from later police interviews.
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In the clip, an officer confronts Alesbrook over a previous claim in which he stated he had contacted police to ask where they were after the child had taken ill - which was later proven to be false.
"This was a lie, there is no message saying 'where are you?'" the officer tells him, before going on to add: "We have interrogated your phone and that is not confirmed on there. What do you have to say about this?"
Leaning against the wall, Alesbrook shockingly mumbles: "F**k all."
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The officer interviewing him then presses the teenager over previous claims that he'd made in previous interviews stating he was asleep and unaware Shemwell wasn't in the flat.
To these questions he shockingly responded: "I say you're boring man."
Alesbrook, 19, had denied causing harm to Elijah but was subsequently convicted by a jury of causing the child's fatal injuries by violently shaking him.
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He has since been sentenced to a minimum of 14 years in prison for the crime. Meanwhile, Shemwell, now 24, has received a total of three years in prison after pleading guilty to two counts of child cruelty.
Speaking about the case, DCI Greg McGill, who led the investigation into Elijah’s death, said in a statement: "Carl Alesbrook was 16 years old at the time of Elijah’s death.
"While a child himself, even a teenager knows the fatal risks posed by shaking a four-month-old baby boy.
"He tried to hoodwink the jury by spinning a story that sought to cover up his guilt - but they saw through his lies and half-truths, and I am grateful for their careful consideration that has ultimately found him guilty."