In a sensational twist, Burke Ramsey is "set to unmask the murderer" of his little sister, beauty queen JonBenet Ramsey, the National Enquirer reports.
The case remains officially unsolved, nearly 22 years after JonBenet was discovered in the basement of the family's Boulder, Colorado, home on Christmas Day 1996.
But, Burke, now 31, is about to "blow the case wide open," National Enquirer claims.
Last year, Burke slapped broadcaster CBS with a $750 million defamation lawsuit for fingering him as his sister's killer in the 2016 docu-series, The Case of: JonBenet Ramsey.
Burke is claiming accusations are a fraud - and he's determined to clear his name.
Investigators are now being urged, according to the National Enquirer, to release their files.
These alleged files allegedly contain more than 60,0000 pages of confidential police and FBI records, handwriting analyses, DNA evidence and medical examinations - and could potentially reveal who authorities believe are responsible for the murder.
Boulder Police Department is fighting to keep the files under wraps, arguing that releasing them to the public will ruin their still active enquiry, National Enquirer reports.
The most popular theory maintains that an intruder broke a basement window, slipped into the home, and up to JonBenet's bedroom, then knocked her out before taking her to the basement.