A mother and her partner have both been jailed for life with a minimum term of 39 years for murdering her son during a campaign of “horrific and prolonged 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 mother Agnieszka Kalinowska, 35, and her long-term partner Andrzej Latoszewski, 38.A jury at Leeds Crown Court heard the 15-year-old, who had been in the UK for less than a year after moving from Poland to live with his mother, was beaten with a bed slat, whipped with an extension cable and stabbed with a needle at the couple’s home in Huddersfield, West Yorkshire.Sebastian’s father Jacek Kalinowski watched proceedings by video link from Poland.Sentencing Kalinowska and Latoszewski, Mrs Justice Lambert told them: “You, Latoszewski, are a bully. Like all bullies, you sought to intimidate and frighten Sebastian, who was weaker than you.“In Sebastian you found an easy prey.“There were times when viewing the footage I was sure you had lost awareness of the fact that you were hitting a human being and not a punching bag.“As for you, Kalinowska, the explanation is simple – you just didn’t care about Sebastian. You were only interested in yourself.”In a victim impact statement read to the court, Mr Kalinowski called Kalinowska “the greatest evil that walks this Earth”.He said: “In a cruel and heartless way you have taken the life of my son. You turned every day of Sebastian’s life into a nightmare.“Why did you hate him to that degree when you allowed that psychopath to treat Sebastian like that, and then you readily participated in the whole thing.“You inflicted so much pain and humiliation on him. You made my son a punchbag for yourself, you committed a terrifying act and you were merciless.“I made many mistakes as a parent. Perhaps I was not able to be a perfect father, but I loved Sebastian. However I could not
