A notorious double-killer serving life for murdering two security guards will be sentenced today for bludgeoning a fellow inmate to death with a fish tank rock.
Victor Castigador committed his latest killing at a maximum security jail while serving a whole-life term for the 1989 "human torch" murders of two workers at an amusement arcade in central London.
The 61-year-old is believed to have hidden the rock inside a sock before launching a savage attack on Sidonio Teixeira in a prison workshop at HMP Long Lartin in Worcestershire.
His latest victim, who was himself serving life for murdering his three-year-old daughter, was pronounced dead after suffering head injuries at the jail on June 20 this year.
Teixeira, 59, was the third inmate to be killed by fellow prisoners at Long Lartin since 2013.
Castigador, originally from the Philippines, was given a 25-year minimum term after the amusement arcade robbery and murders, but the Home Secretary later increased the tariff to a whole-life order.
The "callous, despicable and inhuman" double-killing in April 1989 claimed the lives of two security guards, both in their 20s, who were tied up and set alight at the arcade in Wardour Street, Soho,
Castigador, then 34 and living in Bow, east London, was arrested within days of the robbery, which left two other victims with serious burns.
He will be sentenced at Birmingham Crown Court later.