A 20-year-old man serving a life sentence for murdering a father-of-one was found hanged in his cell on Monday. The Prison Service said a full investigation had been launched into the death of Mark McNamara at Swinfen Hall Young Offenders Institution, near Lichfield, in Staffordshire.
He was found hanging from a ligature in his single cell by staff at 0550 BST.
McNamara, from Birmingham, was six months into a life sentence for stabbing Alton Golding, 30, in February 2002.
Mr Golding, who had become father a fortnight before the tragedy, was stabbed with a bread knife when he caught the heroin addict burgling his home in Erdington, Birmingham.
McNamara was sentenced to life after being found guilty of murder at Nottingham Crown Court in September.
A Prison Service spokesman said: "He was found hanging in his single cell this morning at 5.50am and he was officially pronounced dead four hours later by a doctor.
"There will now be a full Prison Service investigation conducted by a governor from another prison and it is now a matter for the police and coroner."
He said the death was not being treated as suspicious.