A murderer who shot his landlord with a shotgun then stood off with police for several hours has died in prison, a report has revealed.

Peter Grass murdered William Kenyon by shooting him in the arm and in the leg, then shooting him in the head, at a farm in Radcliffe.

The incident at Higher Spen Moor Farm in 2006 came after the friends of 12 years fell out and Grass was ordered to leave the cottage he lived in for several years on the site.

He then stood off with police for several hours, after which he was arrested on suspicion of murder.

The then-52-year-old was convicted after a trial at Manchester Crown Court later the same year, and sentenced to life in prison, with a minimum of 26 years.

The Bolton News:

At the time, the judge Mr Justice Henriques said: “You shot [Mr Kenyon] in a cowardly and shocking attack. You deprived a large, loving family of a fine man.

"I have detected not a jot of contrition throughout the trial, and the facts demonstrate you are exceptionally dangerous. The last minutes of William Kenyon's life must have been pure agony."

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The next year, Grass was moved to HMP Garth, close to Leyland in Lancashire, where he remained until he died a year and a half ago.

According to a report published by the Prisons and Probation Ombudsman this week, the cause of death was cancer, although Grass also suffered from health issues such as COPD and heart disease. He was reliant on his wheelchair.

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The report reads: “On October 20, the officer dedicated to Mr Grass’s night cover called healthcare staff to attend as Mr Grass had become unresponsive.

“They assessed that Mr Grass had died, and this was confirmed by a doctor at 8.40am.”

A clinical reviewer from NHS England expressed no concern over the treatment of Grass.

However, an independent investigator expressed concern over the use of restraints on Grass on a trip to hospital a month around before his death.

The report reads: “The decision was based on his security category alone and did not take account of his current state of health and mobility as it should have done.

“We consider that the level of restraints used was disproportionate to the risk posed.”