Melvin Davis Rees (1933–1995) was an American serial killer who committed five murders in Virginia and Maryland between 1957 and 1959. He murdered and sexually assaulted Margaret Harold, the girlfriend of US Army soldier Sgt. Roy D. Hudson, during a highway encounter near Annapolis; two years later, he murdered the four members of the Jackson family near Fredericksburg, Virginia. After his conviction for the killings, Rees confessed to two other murders, and authorities believed he was involved in two more. Prior to his arrest and imprisonment, Rees was known as a jazz musician in the Washington, D.C. area.