A heroin addict who killed another man in Dublin over two years ago has been sentenced to seven years in prison.

Edward Connors, 31, who is deaf and cannot speak, punched Eoghan Dudley on 6 December 2012 causing him to fall on Dawson Street where he was run over by a bus.

Judge Pat McCartan said today the incident was as close to an accident as can be.

He said Connors cannot but be described as a victim but said society had failed him and Mr Dudley.

However, he said Connors represents a serious risk of reoffending and therefore a serious risk to the community.

The judge said he had no alternative but to send him to prison because the necessary rehabilitation facilities for people like him did not exist in this country.

A Dublin Circuit Criminal Court jury previously found Connors guilty following an eight-day manslaughter trial.

Connors had pleaded not guilty to unlawfully killing 28-year-old Mr Dudley.

Judge McCartan previously requested Connors be assessed for rehabilitation services in the UK.

The court had heard that there are no specific rehabilitation services for deaf people in Ireland.

Ronan Kennedy BL, for the DPP, told Judge McCartan that rehabilitation services for deaf people in Ireland would not be put in place by the Government until 2016.

Connors, of no fixed abode and formerly of Bearna Park, Sandyford, admitted interacting with Mr Dudley but claimed that what looked like a punch on CCTV footage is actually him trying to grab Mr Dudley to stop him falling off the path and going under the bus.

Connors also previously pleaded guilty to two counts of using a syringe to cause injury or threaten to cause injury at Balally Shopping Centre, Sandyford on 17 May 2012 and at Lotts Lane on 18 August 2012.

Judge McCartan sentenced him to two years, to run concurrently, on each of these counts.

Previously Dr Brendan Thomas Monteiro, Consultant Psychiatrist in the field of Mental Health and Deafness, said that there is a facility in the UK suitable to treat Connors. 

Judge McCartan ordered a further assessment to establish if Connors is a suitable candidate for this facility.

Defence Counsel, Oisin Clarke BL, later told Judge McCartan that Connors was unable to be assessed for treatment in the UK due to legal issues and that funding from the State was not available for his rehabilitation.

Dr Monteiro said that if Connors does not get the treatment he needs he will revert to his old ways of living after he serves a prison sentence.

Dr Monteiro described Connor's primitive approach to life combined with a reliance on heroin as "truly explosive" and that it was one such explosion which led to the death of Mr Dudley.

He said that Connors exhibited features of a primitive personality caused by his hearing problems.

This is a psychiatric diagnosis which identifies deaf people who were effectively without any usable language, as a result of which they become quite primitive in their behaviour, Dr Monteiro said.

He said that because of serious communication difficulties between them and parents, teachers or peers, this group of people do not acquire the same skills taken for granted in hearing children and develop without any social, moral or legal boundaries.

"His knowledge and understanding and ability to relate to others was seriously compromised" because of the deprivation of language, Dr Monteiro said.

He agreed with Mr Kennedy since the trial Connors has refused to accept the guilty verdict, and maintains he is not responsible for the death of the victim and is unfairly in prison.