A man has told how he killed a man with one punch, but his victim's parents helped him change his life.

Jacob Dunne approached James Hodgkinson 11 years ago and in brief moment punched the 28-year-old. They had never even met before.

The shocking attack killed James with just a single punch but it also changed Dunne's life forever.

At the age of 19, he handed himself to police and discovered the victim had died nine days after the night in July 2011.