A KILLER faces even longer behind bars after he made a weapon with a toothbrush and razor and used it to slash an inmate at HMP Whitemoor.

Robert Chin, 46, was already serving a life sentence at the March prison for murder when he decided to target a fellow inmate on C-Wing.

The attack, which took place on December 21 last year, left the victim needing 96 stitches and surgery on his face.

Chin armed himself with a weapon made from a toothbrush and razor and slashed the inmate across the face as he walked past him.

The convicted murderer pressed the alarm button and gave himself up to shocked staff. He dropped the weapon, which was concealed in a newspaper.

Chin was sentenced to nine years, which will run consecutive to his current life sentence, on Tuesday. The sentence will impact on his parole date.

Detective Constable Ralph King said: “This was a brutal attack and caused a great deal of harm to the victim.

“It was a completely unprovoked attack and Chin admitted to making and preparing the weapon.”

Paul Cawkwell, governor at Whitemoor, said: “Staff, prisoners and visitors at HMP Whitemoor deserve to feel safe whilst at the prison, and I am extremely proud of our partnership with Cambridgeshire Police that has been so effective in addressing violent behaviour.

“Our policy is clear – we have a zero tolerance policy and will always seek prosecutions for acts of violence committed in the prison.

“This week a violent act resulted in a prisoner being given a nine year sentence, which is a well-deserved result for many hours of work by the two partnership organisations.”