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It's been 20 years since the murder of JonBenét Ramsey, and the case is still unsolved...but for how long? 

The Case Of: JonBenét Ramsey will reopen the investigation into the murder of the six year-old Ramsey, which occurred on December 26, 1996, and the first look at the special is finally here. 

Over six episodes, which will air over the course of a week, The Case Of will use new technology, new interviews, and new experts to reexamine old evidence to try and finally solve the murder, with help from the case's original investigators. 

According to the trailer, which you can watch above, this investigation goes deep. They rebuilt the Ramsey home, chased down old suspects, tracked down the 911 operator who took the original call.

The special will include appearances from former New York City prosecutor, retired FBI supervisory special agent and profiler Jim Clemente; world-renowned forensic scientist Dr. Henry Lee; former chief investigator for the District Attorney in Boulder, Colo., James Kolar; leading forensic pathologist Dr. Werner Spitz; and retired FBI supervisory special agent and forensic linguistic profiler James Fitzgerald

In addition to CBS' limited series event, Lifetime will also be airing an original movie about the case, Who Killed JonBenét?, which will debut later this fall, ahead of the 20th anniversary of the unsolved murder.

The Case Of: JonBenét Ramsey will premiere on Sunday, Sept. 18 at 8:30 p.m. ET and 8 p.m. PT on CBS, and will air one episode each night thereafter.