A MUM and her lover have been found guilty of murdering her 15-year-old son who died after a campaign of torture.
Sebastian Kalinowski died of an infection caused by "untreated complications of multiple rib fractures", after weeks of what prosecutors described as "cruel assaults and abuse" at the hands of his mum Agnieszka Kalinowska, 35, and her long-term partner Andrzej Latoszewski, 38.
A jury at Leeds Crown Court heard that Sebastian was beaten with a bed slat, whipped with an extension cable and stabbed with a needle by his mother and her partner.
After the couple were arrested in connection with Sebastian's death, police seized CCTV cameras from their house in Huddersfield, West Yorkshire, which prosecutors said had been installed partly to "monitor and exert control over Sebastian remotely".
Kalinowska and Latoszewski denied murdering Sebastian but were found guilty at Leeds Crown Court on Friday.
Latoszewski admitted manslaughter on the second day of the trial, while both defendants pleaded guilty to child cruelty a day later.
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The judge, Mrs Justice Lambert, said the pair will not be sentenced until October at the earliest.
The court previously heard that the 15-year-old had been in the UK for less than a year after moving from Poland to live with his mother and her boyfriend.
The teen was beaten with a bed slat, whipped with an extension cable and stabbed with a needle during a campaign of "torture" at the hands of the couple, according to prosecutors.
Prosecutor Jason Pitter QC said the CCTV technology had been installed partly to "monitor and exert control over Sebastian remotely".
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"In a twist, it is that system that has recorded the abuse he had to endure," he told the court.
Jurors heard that on the morning of Sebastian's final day, he went through "the routine of being assaulted by both defendants".
Mr Pitter said CCTV showed Latoszewski taking Sebastian out of the bedroom at 8.25am, before carrying him back around 15 minutes later, "naked, clearly wet and unconscious".
He said: "Whilst some limited efforts were made by Latoszewski to perform CPR, the reality is it may have been too late as Sebastian showed no sign of life once he was brought back into the bedroom.
"At 9.24am, Latoszewski appeared to be trying to pour water into Sebastian's mouth before then blowing into it.
"Was that the beginnings of an attempt to give the impression that Sebastian had drowned by trying to force water into his airways?"
Both Latoszewski and Kalinowska said in their defence statements the assaults were "reasonable chastisement" brought about by Sebastian's behaviour.
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Sebastian had moved in with his mother, Kalinowska, and her partner, Latoszewski in October 2020.
His abuse began as early as January 25, 2021.
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