Al Wicker is a real estate mogul who pushed to have the homeless encampment near his home removed. He put matters into his own hands when he used a propane tank to set off an explosion to take out the encampment and acted as a bystander who witnessed the whole thing, in which their leader, Big Jim, eventually died from smoke inhalation. Matthew Casey and Kelly Severide immediately discovered that he was the one responsible for the arson, as well as learned of the clean-up crew he sent in. He was later arrested for murder and arson.