Court documents have revealed that a 1999 grand jury indicted the parents of murdered JonBenet Ramsay for child abuse resulting in death and accessory to a crime, including murder.
The indictment, released for the first time on Friday, did not point to who might have killed John and Patsy's six-year-old daughter.
The grand jury tasked with investigating the girl's death found that her parents "did unlawfully, knowingly, recklessly and feloniously permit a child to be unreasonably placed in a situation which posed a threat of injury ... which resulted in death".
Members of grand jury leave after meeting in 1999The indictment, which the prosecutor refused to prosecute, said the crimes occurred between December 25 and December 26, 1996.
JonBenet's body was discovered bludgeoned and strangled in her family's home in Boulder, Colorado, on December 26.
The document also alleges both parents intended to delay or prevent the arrest of the alleged killer.
JonBenet's pageant videos were aired around the worldThe couple denied any wrongdoing in their daughter's death.
Patsy Ramsey died of cancer in 2006, still fighting to clear her name.
In 2008, former district attorney Mary Lacy said DNA evidence suggested the girl's killer was a stranger, not a family member, and she announced that she planned to treat the Ramseys as victims of the crime.
Former district attorney Alex Hunter opted not to pursue chargesThe grand jury documents - sealed for 14 years - were released after the Daily Camera and the Reporters Committee for Freedom of the Press filed a lawsuit to seek the records.
The Daily Camera reported in January that members of the grand jury had voted to indict the Ramseys, but then-Boulder district attorney Alex Hunter opted not to pursue the indictment.
Officials have never explained that decision.
John Ramsey's attorney, Hal Haddon, declined to comment on Friday.
No charges were filed against John KarrHe issued a letter earlier in the week opposing release of the indictment, pointing out that Ms Lacy cleared the Ramseys in 2008.
The case remains one of the most notorious unsolved murders in US history.
At the time, videos of the girl competing in child beauty pageants made headlines around the world, with Boulder police receiving thousands of tips over the case.
The case became the centre of media attention for a second time in 2006 when former primary school teacher John Mark Karr claimed he killed the former Little Miss Colorado "by accident".
No charges were filed against Karr after his DNA failed to match a sample found on JonBenet's clothes.