Duncan grew up in the South West region of England, the city of Gloucester to be exact. He lived in a council estate with his Mum (Jenifer, English) and older Brother (Jake) for his entire childhood, getting up to trouble with other kids when he had the chance. Never knowing his Father (Robert, Scottish) had a big impact on his upbringing, without a father figure he became unruly. He was never very interested in school, or following rules, to be honest. Duncan never got close to others, probably because he wasn't the friendly type. His favourite hobby was Arson, it was something he felt he was good at doing, plus he enjoyed doing it. Starting fires in abandoned warehouses was a good way to pass the time, as well as a good way of getting into trouble. His interest in fires gave him a bad reputation on his estate, making him the first one to be blamed for any petty crimes being committed.
This, of course, set him down the path towards more serious crime later on in his life, leading to his eventual incarceration for his so-called hobby. His time in prison just made things worse, learning from other criminals and his past mistakes; he became increasing more irrational about his intentions towards other people. By the time his was out of prison for the third time he had had enough of his home country, showing resentment towards the establishment probably didn't help him either. It was around that time when he got the bright idea to travel to Chernarus, which he did.
He began gathering enough money to leave for Chernarus to begin a new life. He happened to know a guy who could get him out of his country with no questions asked. But once he made it out and the infection hit it changed him, making him unsure of himself. He became a recluse, hiding in the forests and small villages situated all over the country. He began to tell those that he met that he was just a simple backpacker, coming to this country to see the sites. But in reality, he was hoping to cause trouble, an idea that never came to fruition. He quickly learnt how to use most firearms by trial and error, and what he was taught from other survivors he encountered.