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Patsy Ramsey and her husband, John Image Credit: AP

Twenty years after the murder of six-year-old JonBenet Ramsey, three networks are dedicating programming to the unsolved case.

CBS will air a six-part docuseries, The Case of: JonBenet Ramsey, the network announced on Wednesday. Original investigators will team up with new experts to re-examine the evidence using today’s technology and forensics. They will also rebuild the crime scene, conduct interviews and offer new theories.

The Case of: JonBenet Ramsey premieres on September 18 (8.30pm EDT).

Lifetime also announced on Wednesday that it has started production on Who Killed JonBenet? The film will premiere later this autumn.

And Investigation Discovery announced earlier this month that it will air a three-night series, JonBenet: An American Murder Mystery, beginning September 12 (10pm EDT).

JonBenet, a child beauty queen, was found beaten and strangled in the basement of her family’s home in Boulder, Colorado, on December 26, 1996.