To take the life of another person in cold blood is the most heinous of crimes. And to kill a young person, taking away their future, their hopes and dreams, adds another cruel dimension.
In 1979, Paul Carberry chased a man down a train carriage. He mercilessly landed five knife blows on him, wounding him fatally and leaving him to bleed to death.
Carberry was a teenager at that point. The man he killed on that fateful day was a fiancé whose partner was due to give birth.