Credit: Helen H. Richardson/ The Denver Post

Less than two weeks before CBS debuts its three-night docuseries that reexamines the JonBenét Ramsey murder case, A&E has scheduled a new documentary about the disappearance and murder of the 6-year-old beauty pageant contestant.

A&E announced on Thursday that it will air The Killing of JonBenét: The Truth Uncovered, a two-hour documentary that debuts on Labor Day, Sept. 5, at 9 p.m. ET/PT. In December 1996, Ramsey was reported missing by her parents, John and Patsy Ramsey, who reported finding a ransom note. Hours later, the girl’s body was discovered in the basement of their Boulder, Colorado, home. The murder remains unsolved.

The network says that the special will include the first sit-down interview with John Ramsey to mark the 20th anniversary of JonBenét’s death, and he will offer access to his diaries from that time period. It also will offer up never-before-seen details of the case, such as a 1998 interview with JonBenét’s brother, Burke Ramsey, in which he describes his first-hand account of the events. A&E also promises that “exclusive and shocking DNA evidence sheds new light on who actually committed the murder.”

A&E is rushing to get its Ramsey project on the air before its competitors: Investigation Discovery will premiere the three-night special JonBenet Ramsey: An American Murder Mystery on Sept. 12. CBS had previously announced that its six-hour series The Case of: JonBenét Ramseywhich brings together the original investigators of the murder and new experts —will air on Sept. 18, 19, and 25. (A trailer for that series, which includes the construction of a replica of the family house, can be seen here.) In addition, Lifetime also will air a JonBenét TV movie, tentatively titled Who Killed JonBenét? in November.