Tony Chang is a character in the novel Final Destination: Destination Zero. He is the senior agent in charge of the LA field office of ATF, and Jim Castle's boss.
Biography
After the South Hill Metroline bombing, Tony and Jim went over to the subway to investigate what had happened, first asking a wounded officer if he had seen anything suspicious. He told them that he saw a crazy woman shouting out that a bomb was going to explode, shortly before it actually did. After the incident, Tony and other senior members of various law enforcement branches in LA hold a conference, where they watch a video of a masked terrorist demanding the release of the prisoners from Guantánamo Bay and Abu Ghraib, the American troops to be released from Iraq, Saudi Arabia and Afghanistan, the Russians to pull out of Chechnya, and one hundred million dollars to be deposited in offshore bank accounts. After hearing the request about the money, Jim realized that the terrorist wasn't an Islamist or a religious fanatic, but merely someone who was eager to get paid.
After further investigation, Tony finds the names of the terrorists: Sean Reilly, Leon Khalid, and Dan Hoffman. All of the terrorists were members of organizations that they either angered or disobeyed and were now living on the run, so they conspired together to blow up the train in order to force the government to give them money. They didn't comply with their wishes, and Tony and Jim eventually found the terrorists at Van Nyus airport. Along with a full assault team, Tony and Jim storm the hangar where the terrorists are hiding, and Dan and Leon are killed. Tony stays behind to secure the rest of the hangar with the other officers while Jim gets on a motorbike and chases Sean, eventually capturing him.