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.

This 7-part season is filled with expert interviews and in-depth portraits of some of America's most infamous killers including John Wayne Gacy, David Berkowitz, Richard Ramirez, James DeAngelo, Aileen Wuornos, Jeffrey Dahmer, Andrew Cunanan, Ted Bundy and many others.

Elizabeth Vargas takes a fresh look at the most notorious cold case murder in American history. By tracking down new leads and with new DNA tests, this episode takes a deeper dive in hopes of bringing peace to the Ramsey family. Featuring an exclusive interview with John Ramsey, as well as many never-before-seen photos, the documentary also pursues numerous "intruder theories" of the crime. Vargas and retired FBI agent Robert Clark investigate the possibility that the killer may have ties to a group that believed in extra-terrestrial life and the end of the world.

OverKill examines the 1996 murder of JonBenet Ramsey. It looks at evidence gathered over the years by Lawrence Schiller author of the bestseller "Perfect Murder, Perfect Town". It looks at police investigation tapes and sworn depositions offered by many of those involved in the case and tries to piece together what happened.

Clemente is joined by Scotland Yard behavioral analyst Laura Richards. Together, and with the aid of several others involved in the original case, they will try and solve the mystery of Ramsey’s death “once and for all.”

Who killed JonBenét? It's one of the most enduring American mysteries. Revisit the homicide that gripped the nation, with exclusive interviews and never-before-seen footage from the crime scene.

Hosts Ryan & Shane discuss mysteries surrounding notorious unsolved crimes.

This compelling documentary series presents a countdown of America's 60 most notorious unsolved mysteries and crimes.

Aphrodite Jones goes behind the scenes of famous murder cases to uncover hidden secrets and new information to shed new light on these sensational stories.

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.

Using the power of television, Dr. Phil McGraw presents compelling stories about real people with a variety of emotional and behavioral problems, stripping away the shame and embarrassment that too often keep people from seeking help. Its a show that is suppose to help people with their problems and to find a solution on live TV .

E! True Hollywood Story is an American documentary series on E! that deals with famous Hollywood celebrities, movies, TV shows and also well-known public figures. Among the topics covered on the program include salacious re-tellings of Hollywood secrets, show-biz scandals, celebrity murders and mysteries, porn-star biographies, and "where-are-they-now?" investigations of former child stars. It frequently features in-depth interviews, actual courtroom footage, and dramatic reenactments. When aired on the E! network, episodes will be updated to reflect the current life or status of the subject.