A grand jury voted to indict JonBenet Ramsey's parents in 1999 on charges of child abuse resulting in death but the prosecutor never signed the indictment, according to a new report by The Daily Camera.
Then-Boulder District Attorney Alex Hunter told media back then that he did not believe his office had enough evidence to file any charges, though the Ramsey family remained prime suspects for years before being absolved in 2008.
Child abuse resulting in death charged with "knowingly and recklessly" is a Class II felony that could have resulted in up to 48 years in prison.
On Dec. 26, 1996, 6-year-old JonBenet was found bludgeoned and strangled to death in the basement of her family home. A ransom note from an anonymous group of individuals "that represent a foreign faction" asking for $118,000 in exchange for the safe return of JonBenet was found just hours before, but no call ever came from a kidnapper and it was never linked to a murderer.
The entire Ramsey family was cleared of any involvement in the murder of JonBenet back in 2008, thanks to then newly discovered DNA evidence, according to 9News. Patsy Ramsey, JonBenet's mother, died 2 years earlier in 2006 of ovarian cancer, tragically, she was still considered a possible suspect when she died.
Beginning in 2010, investigators reopened the case and launched a fresh round of interviews with witnesses that could provide more insight into the murder, according to ABC News, but nothing fruitful came of those interviews.
The DNA evidence still points to an "unexplained third party" that serves as a vague lead for authorities still pursuing the case, TIME magazine reported.
According to 7News, Boulder police have tested more than 150 DNA samples and investigated nearly the same amount of potential suspects in their ongoing investigation, but none have ever been linked to the crime.
After all these years, Boulder police have received thousands of tips about her murder and still receive several monthly. Boulder District Attorney Stan Garnett said in 2010 that he personally gets five or more tips each month, according to Fox31. The ones that have potential are passed along to Boulder police's Major Case Unit. There have been plenty of false leads as well, including most famously John Mark Karr -- who bizarrely admitted to being with JonBenet the night of her death, but DNA evidence later cleared him of any wrongdoing in this case.
For a thorough timeline of the case's major moments, visit The Daily Camera's interactive timeline of events from 1996 through 2012.
It remains one of the most notorious murders in U.S. history and a decade and a half later there is still no justice for JonBenet.
If she were alive today, JonBenet would be nearing her 23rd birthday on August 6.