Umbrella killer Gerald Rowatt admits attack in prison
A killer who stabbed a man to death with an umbrella has had his jail term increased for an attack in prison.
Gerald Rowatt, 42, admitted punching fellow inmate Christopher Mason at Low Moss Prison, near Bishopbriggs, in East Dunbartonshire, on 29 May.
At Glasgow Sheriff Court he was ordered to serve another 328 days, beginning when his current jail term ends.
Rowatt was jailed for nine years in 2005 after he admitted killing 55-year-old John Rennie in Glasgow.
On 3 December 2004, he broke an umbrella over Mr Rennie's head and then rammed the broken metal shaft into his mouth.
The thrust severed Mr Rennie's carotid artery and he bled to death within minutes on the 13th floor of Blythswood Court, in the city's Anderston area.
Rowatt was jailed after admitting culpable homicide at the High Court in Glasgow.
The city's sheriff court heard how the prison attack happened after Rowatt was given permission to go into Mason's cell in the Clyde Wing of Low Moss prison after being invited in by him.
He left the cell area but returned to it with two other inmates. It was then Rowatt punched Mason to the right side of his head.
Mason, who was bleeding, then made his way out of the cell and alerted staff.
Sentencing him for the attack, Sheriff Kenneth Mitchell told Rowatt: "You're not entitled to assault another prisoner. Crimes of this sort cannot be tolerated."