Dustin Brooks came from a family of wealth, meaning throughout his life he got to experience a more rich side of things. He grew up wearing designer clothing, driving a well above average car for his first, and generally having a feeling that he was better than everybody else. Dustin got his enjoyment out of going out to parties and doing other various things with friends and girls, all while making it even better under the influence of one (or more) of many drugs.
When Dustin turned 18, his life became even more entertaining, although his parents died in a fatal car crash, it did not phase him much as he never really got close to his parents. They only bought him what he wanted to keep him quiet, and they didn't exactly care what he did. Also, not to mention, he inherited their large bank accounts and most of their possessions, which brought an even bigger smile to his face.
Large sums of money in a careless 18 year old's hands, bad idea. Dustin spent his money without a care, buying super cars, more clothes and jewelry than he knew what to do with, and multiple houses in different countries. Dustin visited these houses bringing friends and generally whoever wanted to come, the more was better. He was visiting Chernarus at one point with a large group of friends when the infection started. Dustin owned a larger house in Chernarus and they were all staying there for a week.
Dustin left his house the night the group arrived to Chernarus to make his runs and pick up what would be needed for the week they would be at the house. When he returned to his house something was off. Through his house windows he could see what was clearly not his friends and appeared to what he later found out was the infected. He tried to sneak around to a window to get a closer look inside, but he tripped and landed on his key fob to his car, which unfortunately enough set off his car alarm. The infected inside quickly turned their attention to Dustin, and Dustin quickly jumped up and sprinted for the forest.