Several years ago, King was a notorious criminal in London. However, he made far too many enemies who were all too eager to murder him. As a result, King fled to Los Santos to start a new life, determined to keep his past secret.
At first, King engaged in petty crimes with other shady figures in the city. However, he discovered that crime in Los Santos was just as dangerous as back home. Eventually, King found his calling volunteering for the local emergency medical services. It wasn't long before Dr. Cross gave him the opportunity to become one of the first doctors employed at Pillbox Medical. Since then, King has seldom ever taken his duty lightly.
Recently, King was left paranoid and angry due to a string of unfortunate events at Pillbox. First, Lees Grey informed him a mysterious hitman working within the hospital wanted him dead. In response, King pushed many of his loved ones away in a bid to protect them. Soon, Lees Grey herself disappeared, causing King to tip over the edge. After a much needed vacation--and a work suspension--King returned to his work at the hospital. Later, Kayden Steele sent him on a wild goose chase that hurt his friendship with Andrew Ducksworth. In spite of these incidents, King hasn't lost his determination to saves lives and protect the friends he's found in Los Santos.