Watch Full The Serial Killer's Apprentice (2025) : Movie Trailer Dr. Katherine Ramsland interviews Elmer Wayne Henley, the sole survivor of the 1973 Houston Mass Murders, to unravel his chilling journey from manipulated teen to convicted killer — and the terrifying truth behind the line between victim and predator. | ||
| Release Date | : | Aug 17, 2025 |
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| Genres | : | Documentary, Crime |
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| Casts | : | Katherine Ramsland, Elmer Wayne Henley |
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