Investigation Discovery has set a three-night television event series focusing on the JonBenet Ramsey murder investigation for premiere on September 12. It was announced today at TCA.

JonBenet: An American Murder Mystery (wt) chronologically reexamines the evidence in the case that gripped the nation, a 6-year-old beauty queen mysteriously murdered in her own home the day after Christmas 1996. Investigation Discovery is producing the series in partnership with Weinstein Television, Jupiter Entertainment and American Media.

Exclusive interviewees featured in the series include Gordon Coombes, a former investigator for the Boulder County District Attorney’s office; Diane Dimond, an investigative journalist for Hard Copy who covered the case on the ground in Boulder from the very beginning; Bobby Brown and Steve Pease, both former Colorado Springs Detectives and protégés of Lou Smit’s famed Apple Dumpling Gang—a group of retired law enforcement officials famous for solving some of the nation’s toughest cold cases.

Others interviewed include Ollie Gray and John San Agustin, private investigators for the Ramsey family and leading voices advocating the “Intruder Theory”; Bob Whitson, former Sergeant in the Boulder Police, who was in the Ramsey house the day JonBenét’s body was discovered; and Pamela Griffin, Patsy Ramsey’s confidant who handmade all of JonBenét’s pageant costumes.

The project joins another Investigation Discovery true-crime series OJ Is Innocent, which is slated for premiere in 2017, and follows on the big-story true-crime floodgates opened by the success of FX’s American Crime Story: The People vs O.J. Simpson. Other  true-crime series currently in the works include the Menendez brothers murder case set at NBC, and another about the abduction of Patty Hearst at CBS. CBS also has a limited series on the JonBenet Ramsey case and a feature film also is in the works.

JonBenet: An American Murder Mystery (wt) is produced for Investigation Discovery by Weinstein Television, American Media and Jupiter Entertainment with Harvey Weinstein, Bob Weinstein, Patrick Reardon, Stephen Land, Allison Wallach, Matt Sprouse, David Pecker and Dylan Howard as Executive Producers. Pamela Deutsch is senior executive producer for Investigation Discovery.