It’s been nearly 20 years since the mysterious death of JonBenét Ramsey — a 6-year-old pageant girl from Colorado whose 1966 murder went unsolved — and we’re no closer to uncovering the truth. With the anniversary of her killing nearing, Lifetime plans to revisit the case with an original film examining the case from beginning to end.

The film, titled “Who Killed JonBenét?,” will begin with the 911 call and investigation and expand upon details that may provide some insight into what happened on Dec. 26, 1996. The made-for-TV movie will include recently uncovered information that could implicate new suspects and take a new approach to old evidence.

“Who Killed JonBenét?” boasts a cast of heavy-hitters, including Eion Bailey (Detective Steve Thomas), Payton Lepinski (JonBenét Ramsey), Michel Gill (John Ramsey), and Julia Campbell (Patsy Ramsey). According to Deadline, the film is being produced by EveryWhere Studios and Brightlights for the network. It is executive produced by Julia Eisenman, Tom Mazza, Anne Carlucci, Shawn Williamson, and Jamie Goehring. Jason Lapeyere has been pegged as the producer of “Who Killed JonBenét?” and the script was written by Brian L. Ross.

“Who Killed JonBenét?” will premiere on Lifetime in the fall, around the same time CBS and Investigation Discovery plan to release several different shows regarding the notorious unsolved mystery.

In the years since JonBenét’s death, several theories have cropped up about her passing. One particularly strange story, which surfaced in February, suggested that the young girl had not been killed, but rather was living as pop star Katy Perry. The theory appeared on YouTube, with user Dave Johnson suggesting that “nobody died, nobody got hurt.” He went on to say that he knew for “a fact” that the “Rise” singer is JonBenét, noting that they both “have the same eyebrows.” The problem? Perry is six years old than JonBenét would have been had she still been alive.

Another conspiracy theorist further expanded on the theory that Perry and JonBenét are one in the same by pulling a line from her memoir. As was previously reported, in the book Perry wrote that she was not “one of those stage kids,” before naming JonBenét specifically.

“There was no JonBenét Ramsey inside of me waiting to burst out,” she wrote.  

JonBenét’s death remains a mystery. She was found beaten and strangled in the basement of her parents home just one day after Christmas in 1996. Some suspect a predator of having taken notice of her during a pageant, while others believe that members of her family are responsible. Her mother and father, as well as her brother Burke Ramsey, were all eyed as suspects at the time. All three were cleared of any wrongdoing partially in 2003 and fully in July 2008.

JonBenét Ramsey Lifetime will release an original film examining the mysterious death of JonBenét Ramsey aptly titled, “Who Killed JonBenét?,” this fall. Photographed above: JonBenét Ramsey's grave in Marietta, Georgia, on Aug. 16, 2006. Photo: Getty Images