The screenplay was completed in mid-1979 by Victor Miller, who later went on to write for several television soap operas, including "Guiding Light", "One Life to Live" and "All My Children"; at the time, Miller was living in Stratford, Connecticut, near Cunningham, and the two had begun collaborating on potential film projects. Miller delighted in inventing a serial killer who turned out to be somebody's mother, a murderer whose only motivation was her love for her child. "I took motherhood and turned it on its head and I think that was great fun. Mrs. Voorhees was the mother I'd always wanted—a mother who would have killed for her kids." Miller was unhappy about the filmmakers' decision to make Jason Voorhees the killer in the sequels. "Jason was dead from the very beginning. He was a victim, not a villain."