He said: “For most people, restorative justice is a pretty new concept or they know about it vaguely.

“Ever since I heard of the idea a year or two ago, it seemed to me to be going down the right lines of making people who had committed an offence face up to what they had done.

“The best way of doing that is to come face to face with their victim.

“Human nature dictates that when you’ve done something you’re not proud of or wrong, you desperately try and find ways of minimalising it.

"We’ve all got a range of excuses we grow up with from childhood.

.... Dave said he hasn’t finalised what he would say to his son’s killer, but would want him to know ‘the kind of person Adam was’.

“I would take in some of the things we have said, and his friends have said, about Adam.

“He has to know the impact his death has had on our lives and there are questions about why he behaved the way he did and why he didn’t admit to being responsible and went down the ‘self-defence’ route.

“They are questions he does need to ask himself, if he hasn’t already.”

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