The dead girl on a tree is a fictional murder victim featured in the A Nightmare on Elm Street and Friday the 13th film franchises. Played by actress Jamie Mayo, she appeared in the 2003 crossover film, Freddy vs. Jason.
It is unclear whether this unnamed female individual was an actual person or simply a manifestation of a dream had by undead serial killer Jason Voorhees. In the dream, Jason stalked and impaled a camp counselor named Heather at Camp Crystal Lake. After pinning her to a tree with a machete, Heather's face morphed into the image of a deceased male youth. The boy mouthed the words, "I deserve to be punished", before morphing into the image of a similarly deceased female victim. This girl, who was clearly a victim of having her throat sliced open, continued the sentiment saying, "We all deserve to be punished". It is possible, that this dream image may have been that of an actual person that Jason had killed at some point in his past.