Wilkinson had a history of sexual violence
A man has been jailed for life for the sexually motivated murder of a fellow prison inmate in Nottinghamshire.
Neil Wilkinson, 29, admitted smothering cellmate Stephen Hartley, 28, with a pillow during the attack at HMP Whatton on 25 August 2008.
Wilkinson was told he must serve a minimum of 24 years in prison by the judge at Nottingham Crown Court.
In a statement, Hartley's mother said her son should never have been put in a cell with Wilkinson.
Hartley had only shared a room with his killer for two days after a cell-sharing policy was introduced at the category C prison for adult male sex offenders.
Wilkinson, originally from the Greater Manchester area, was in jail for raping a man at knifepoint, while his victim, a former soldier, was serving a sentence for grooming a 15-year-old girl over the internet.
Earlier in the day, Wilkinson had boasted to other inmates about how he planned to have sex with heterosexual Hartley "no matter what", the court heard.
Hartley's mother, Janet, said she hoped someone would investigate the way prisons were run following her son's death.
She said: "How can my son or anyone else be placed in a cell with Neil Wilkinson?
"It seems clear to me that he is a dangerous person and my son has lost his life at his hands."