Matt Duncan is an old friend of Carl Porter. In a flashback to 2006 in "Lineage", Matt Duncan was one of the many local business owners who was being extorted for "protection money" by Joe Ryan and his gang of racketeers. Though he tried to make a stand, Ryan got back at him by arranging a hit and run at Matt's youngest daughter, Lucy, in front of their house. On Thanksgiving, he took Carl's revolver while he was meeting Ryan to pay up. When he saw them, Matt shot Ryan to death, causing his body to fall in the water. Sometimes afterwards he and his family apparently moved to Florida.