BEVERLY HILLS, Calif. (AP) - Twenty years after the murder of 6-year-old JonBenet Ramsey, two networks are dedicating programming to the unsolved case.

BEVERLY HILLS, Calif. (AP) Twenty years after the murder of 6-year-old JonBenet Ramsey, two networks are dedicating programming to the unsolved case.

CBS will air a six-part docuseries, "The Case of: JonBenet Ramsey," the network announced 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 Sept. 18 (8:30 p.m. EDT).

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

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