A man who admitted murdering his father has been found dead.
The body of Lukasz David Adam Lukasik was discovered in his cell at Hull Prison.
Lukasik had admitted killing his father, attempting to kill his mother and hurting his sister in Selby on 29 December.
The 36-year-old was due to be given a life sentence at a court appearance on Friday.
Judge Thomas Bayliss QC says he has received a death certificate from the Hull coroner stating that Lukasik is dead.
Lukasik pleaded guilty to murdering his father Jerzy and attempting to murder his mother Maria in Finkle Street, and causing actual bodily harm to his sister Monika in Charles Street.
The Hull coroner has started an investigation into his death.