The Dover Demon is an alleged cryptozoological creature sighted on three separate occasions in the town of Dover, Massachusetts on April 21 and April 22, 1977.It has remained a subject of interest for cryptozoologists ever since then. Cryptozoologist Loren Coleman was the initial investigator and the individual who named the creature the Dover Demon; it was disseminated by the press, and the name stuck.
Coleman quickly assembled and brought into the inquiry three other investigators: Joseph Nyman, Ed Fogg, and Walter Webb. All were well-known ufological researchers in eastern Massachusetts, with Webb being the assistant director of the Hayden Planetarium at Boston's Science Museum.
Coleman did not feel he was necessarily dealing with a ufological phenomenon, but he wanted to have seasoned investigators with good interviewing skills to do a comprehensive examination of the eyewitnesses and their families, as well as law enforcement, educational, and community members.