Frank meets Darcy while exploring the quarantine area at the end of Case 0. After gathering evidence, Frank will find that Darcy has entered the scene. He seems eager to gather information for the story of what's happened to cause the outbreak. He will tell Frank to go speak to his "girlfriend" Paula who has information about the organization (named Obscruris) who may be behind the outbreak.
Darcy is a character in Dead Rising 4.