A prisoner at Whitemoor Prison in March, Cambridgeshire has been given a further life sentence for stabbing an inmate in the neck with a makeshift weapon.
43-year-old David Watts stabbed the 61-year-old inmate in June 2015.
Earlier this week he was sentenced to life with a minimum term of six years and a further 18 months to run concurrently.
Watts was already serving a life sentence for wounding with intent as well as a burglary in 2001.
Then in 2010 he was further convicted of the attempted murder of an inmate and was issued another life sentence.