Sinclair was raised in a middle class family, and had a fairly normal childhood. There was no particular big event that caused him to change as a child, but throughout his teenage years he became more and more socially inept as his parents would put it. In a bid to bond closer with his son, when Sinclair was around 15 years old, his father decided to teach him marksmanship in handguns, with the premise that it would be a simple hobby, and may even protect him one day.
Despite his father's efforts, Sinclair never did become closer to him. He neither liked him nor despised him. Sinclair took an immense interest to this new activity, however, and regularly obsessed over it, bringing a gun with him wherever he went. Not to protect himself, but so that he could feel the cold, lustful metal of his favourite gun, a silver .45 semi automatic whom he had named, 'Saviour'. He carried this gun well into his adulthood, and continues to carry it today.
After moving out of his parents home at the age of 16, he slowly lost all contact with his parents, the build up of which had been really been happening since his infancy. It was on the eve of his 18th birthday that he killed his first man. It was justified really, he insisted to anyone that knew, which was only himself. His victim was a petty thief that had just stolen a lady's purse without her knowledge. Riding on good intentions and over confidence, without thinking, Sinclair had whipped Saviour from his waistcoat pocket, and shot the man twice through the heart. The woman screamed as she looked on. Her expression wasn't very thankful as she did. Sinclair frowned, and returned her purse to her while she was shaking and sobbing. It turned out that was her husband, who had previously offered to carry her purse for her. Sinclair had no sympathy for her and moved on. Employing himself as a contract killer, he believed he would earn a fair amount of money for his art. And he did considerably. Any person, no questions asked. As Sinclair thought, they were all probably evil anyway.