David and older brother Michael were students at Malden Middle School. On October 23rd, as instructed by their father beforehand, Michael got David away from their teachers and hid while the other students and teachers were heading to a vault. They remained at the school until their father came and took them home, where they all hid in the family's backyard bunker. There they hid until late January 2078 when their father along with Lance and Leon Ames and their family, begun fortifying the neighbourhood. While in the bunker David kept asking about his mother and when she would get home which she never did. As of April 2078, things were going relatively well until raiders or desperate survivors attacked the neighbourhood and forced Wayne, Michael and David to flee. Before they fled, David, still hoping his mother would find them, left a holotape for his mother.
David Tournquist is mentioned only in Fallout 4.