A homeless man has been convicted of killing a 23-year-old man in Tallaght last year.

34-year-old Thomas Kinsella with an address at Orchid House on James's Street in Dublin was found not guilty of murdering John Murdoch on 27 August, 2011, but guilty of manslaughter.

The jury took just under three hours to reach their unanimous verdict.

Prosecuting Counsel Dominic McGinn said Kinsella pulled out a knife and stabbed Mr Murdoch in the chest and then used the knife to threaten Mr Murdoch's two friends before stabbing him again.

John Murdoch shouted "You've already stabbed me" but Mr Kinsella, continued Mr McGinn said.

Mr Kinsella insisted that he was defending himself, after a group that included Mr Murdoch threw bricks and bottles at him and his two friends, a man and woman.

The trial heard that the incident began with Mr Murdoch and his two male friends began calling Mr Kinsella's group 'junkies' as they walked past them.

The three recovering drug addicts ignored them and kept walking but were followed.

In a victim impact statement the victim’s sister Amanda Murdoch said the family's lives would never be the same again.

Mr Justice Barry White remanded Kinsella in custody for sentencing on the 28 January.