For the first time, exclusive and never before heard audio diaries of legendary detective Lou Smit will reveal captivating insight into one of America's most notorious cold cases - the murder of 6-year-old pageant queen JonBenét Ramsey.

More than 25 years after her murder, mystery still surrounds the infamous case of JonBenét Ramsey, who was killed inside her family's home in Boulder, Colorado in the early morning hours just after Christmas. This documentary explores the unsolved crime with unprecedented access and family cooperation from John Ramsey, JonBenét's father, who after finally being cleared as a suspect, continues to push the Boulder Police Department to re-test and make available key pieces of physical evidence which may hold the answers to the killer's identity.

Examines the 20 of the most shocking unsolved crimes in history including the disappearance of Adam Walsh, the murder of Jam-Master Jay, the murders of Jason Allen and Lindsay Cutshall, the Tylenol Poisoning scare, the mysterious death of musician Bobby Fuller, the Zodiac Killer, the assassination of spy Alexander Litvinenko, the murder of Vanessa Johnson, the murder of Amber Hagerman, the Isabella Stewart Gardner Museum Robbery, the disappearance of George Allen Smith, disappearance of heiress Jacqueline Levitz, the disappearance of Madeleine McCann, the 2001 Anthrax attacks, the D.B Cooper skyjacking, the murder of Chandra Levy, the disappearance of Jimmy Hoffa, the murder of the Black Dahlia, the murder of JonBenet Ramsey, and the disappearance of Natalee Holloway.