A cannabis-smoking mother who drowned her two young sons, aged two and five, and tucked them into bed for their father to find has been sentenced to life imprisonment on Friday and will serve a minimum of 21 years, Daily Mail reports.

The 47-year-old mother, Kara Alexander, of Dagenham, East London in the United Kingdom, was found guilty of murdering Elijah Thomas, two, and Marley Thomas, five, in the bath at their home in December 2022.

At Kingston Crown Court on Friday, Justice Bennathan reportedly sentenced Alexander to life imprisonment with a minimum term of 21 years and 252 days.

He also warned that Alexander’s reliance on super-strength cannabis, known as skunk, should serve as a warning that it can ‘plunge people into a mental health crisis in which they may harm themselves or others’.

The boys’ father Selvin Thomas was reported to have found found his sons lying dead on their bunk beds after they were killed by their mother. They had been tucked in but he immediately knew they were dead, describing them as cold and hard to the touch.

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Thomas, who had split up with Alexander just three months earlier, reportedly began screaming, “Kara, Kara, Kara. You’ve killed my children.” But she had already fled the house and he called the police.

He was due to have the boys that weekend and was worried because he had not received any messages or calls from Alexander. When he arrived at their home his ex-partner said they were upstairs sleeping before slamming the door in his face.

But after he demanded entry, he reportedly ran to his sons’ bedroom to find they had been murdered, and their bodies lying side-by-side on their lower bunk bed. By the time the horrified father ran downstairs Alexander had fled.

She was arrested about an hour later and later claimed she had left the boys in the bath alone while she smoked cannabis.

“They had the duvet up to their shoulders, only their faces were visible. He touched Marley’s face, on his right cheek, and he was freezing cold and hard. He knew immediately that they were dead and thought they had been dead for some time,” prosecutor Philip Evans reportedly told the court.

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The cause of death was drowning or suffocation.

On Friday at Kingston Crown Court, Evans read out the victim impact statement of Thomas, who could not be present due to illness saying.

“The events of December 2022, have obviously had a profound impact on me and my family,” he said in Selvin Thomas’ words.

“Kara ensured there would be maximum impact on me by engineering a situation where I would find Marley and Elijah deceased in bed. I am coming to terms with the fact I dedicated seven years of my life to a cold-hearted, selfish and extremely stupid demon.

“I believe Kara’s intention was to frame me for the murders and somehow present herself as a victim. She was able to brutally end the lives of two innocent children, put them in the bed and wait calmly for me.

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“She has shown no remorse or provided any kind of explanation or apology, she did not consider the impact this would have. Despite the correct verdict being handed down, there still remain many unanswered questions. It is a pain that follows me all day, every day and will do for the rest of my life,” he read.

On her part, Alexander had reportedly claimed it was “an accident” when she left the boys in the bath as she smoked cannabis.

The report stated that after deliberating for six hours and 54 minutes, the jury at Kingston Crown Court found Alexander guilty of two counts of murder.

Jailing her on Friday morning, Justice Bennathan reportedly told Alexander, “The heavy use of skunk or other hyper strong strains of cannabis can plunge people into a mental health crisis in which they may harm themselves or others. If any drug user does not know that, it is about time they did.

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“On the evening of December 15, 2022, you had been smoking skunk, you had been doing so for weeks before, probably longer. You drowned them both, I cannot reach any conclusion other than by your state at that time you intended to kill them.

“The bath was probably still run from the evening routine and I do not think your dreadful acts were pre-meditated. The next morning their father, worried by your unusual signs, came and found them – the stuff of nightmares.

“I find you were in a psychotic state when you killed your two sons. On the proper medical definition, I accept that it was cannabis induced, even if there were other contributing causes.

“That finding of psychosis is consistent with the jury’s rejection to your defence of diminished responsibility. You had a previous psychotic episode in 2016.

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“I also note that in December 2022, you spoke regularly to two members of your social circle about your heavy cannabis use, they both knew you were looking after small children, yet neither of them warned you of any risks.”

The judge added that her “shocking abuse of trust that any small child ought to be able to have in their mother or father” was a significant aggravating factor.

“You not only lack any previous convictions but before that terrible evening you had been a caring mother, that stands as a stark contrast of what normally happens when a child is killed. You may not have been told that your previous psychotic state could be triggered by cannabis.

“Every day you will remember and grieve the little boys whose lives you snatched away,” he was quoted as saying.

Marley and Elijah, also known as Teddy, had previously lived with Alexander and Thomas in Hackney before they split up and she moved to Dagenham with the boys.