Murdered by My Daughter: The shocking details behind double murder by teenage couple

'Twilight killer'

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Murdered by My Daughter on Channel 5 tonight uncovers the shocking details behind a double murder by a teenage couple.

The so-called 'Twilight killers' are one of Britain’s two youngest double murderers.


Lucas Markham and his girlfriend, Kim Edwards, were both just 14 years old when they killed Kim’s mother Elizabeth and younger sister Katie at Kim’s home in Spalding, Lincolnshire, in April 2016.

The reasons? Kim was jealous of her mother Elizabeth’s attention for her 13-year-old sister, Katie – and Lucas is believed to have begrudged Mrs Edwards for trying to end his relationship with Kim. Both are now serving a minimum of seventeen and a half years for murder, with a judge lifting the order that would normally have guaranteed both killers anonymity because of their age.

Channel 5's Murdered by My Daughter explores the case with exclusive extracts of the audio recording made by police as they interviewed Lucas.

The chilling documentary sees Lucas telling police in a calm, undramatic voice: “I went into her mum’s room and stabbed her in the neck while she was asleep on her side and smothered her face with a pillow.

“And after I knew she had gone, I went into Katie’s room – which is the same room as Kim’s – and I thought I stabbed her, but… I thought I stabbed her, but I’m not a hundred per cent sure – it was, like, her on a mattress and then I smothered her face with a pillow too.”

He admits killing Elizabeth then admits he killed Katie because he thought she would call the police. Asked to confirm if that was the only reason, Lucas casually replies: “Pretty much."


The police officer who led the investigation, Detective Superintendent Martin Holvey of Lincolnshire Police, told the programme that neither Lucas nor Kim showed any remorse during questioning by police – and that their confessions were “just like they’re telling a story”.

He added: “You actually recount the story to your team and everyone sits there - hardened detectives - and think, I can’t believe what you’re hearing.

“You know, over 30 years as a cop, you look at this case and there’s nothing that rivals it that I’ve come across.

“A really brutal, chilling, cold and callous act that was carried out by these two children on two defenceless victims.”


Meanwhile, in her interview with police, asked how she felt immediately after her mother and sister had been killed, Kim said: “I was okay with it. Just the fact that it happened so quickly that, like, gave me peace of mind cos like, you know, it wasn’t like torture or anything.”

Murdered By My Daughter airs tonight, 9PM on Channel 5

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