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David A. Prior was an American director, screenwriter, and producer. Prior started his career with the horror film Sledgehammer (1983), and the action film Killzone (1985). Shortly after, he co-founded Action International Pictures (AIP), his first directorial effort with this enterprise were Deadly Prey, Aerobicide, and Mankillers released in 1987. Subsequently, Prior made action films until the late 1990s. Wikipedia