A man who killed his wife and their 12-year-old daughter at their home has been jailed for life.
Peter Nash, 47, murdered Jillu Nash, 43, and their autistic daughter Louise in Great Waldingfield, Suffolk, in September.
Ipswich Crown Court heard Nash tried to take his own life after the killings and was found covered in blood.
He was found guilty last Friday and has today been jailed for a minimum of 40 years.
Earlier in the trial, the court had been told Mrs Nash had started a relationship with a work colleague and planned on leaving her husband.
Nash had pleaded not guilty to the two murder charges but jurors today found him guilty by unanimous verdicts.
Post-mortem examinations found Mrs Nash had been strangled before having a T-shirt stuffed in her mouth, while Louise was stabbed in the abdomen.
David Josse KC, prosecuting, had told proceedings: "The defendant and Mrs Nash had a difficult and unhappy marriage.
"They married in 2009 and the stresses and strains of that relationship were undoubtedly compounded by Peter Nash losing his job by redundancy in 2020."
He added Nash was "largely responsible for the care of their autistic daughter Louise", who was "non-verbal, only able to say a few words".
Mr Josse said that Mrs Nash had recorded some conversations she had with her husband, and in August 2022 Nash called her "a schemer who caused chaos to gain attention".
Mr Josse added: "When he suggested she had been cheating on him for some four months, she corrected him and told him it was eight months."
Nash strangled his wife for around ten minutes after confronting her over photos he had found of her with another man.
Once she was dead he sat thinking what to do next before deciding to kill Louise and himself.
The court was told he believed he ‘lawfully killed’ Louise as she was his "property" and he did it to protect her because he did not trust anyone else to look after her.
Mr Josse said that TikTok videos, accessed by the defendant, showed the "embittered" and "self-pitying" mindset that he had.
