Explore Canada's most baffling cold case: Was nurse Cindy James the victim of an invisible monster or a tragic architect of her own demise?

Related topics: A Current Affair (American TV program), Aerosol paint, Animal abuse, Anorexia nervosa, Answering machine

When Tara Calico vanished on a morning bike ride, she left behind a broken Walkman and a Polaroid that would haunt the world for decades.

Related topics: 48 Hours (TV series), A Current Affair (American TV program), A Current Affair (U.S. TV program), Albuquerque, Albuquerque Journal

When a career criminal terrorized a Missouri town for 20 years, the law failed to stop him. So, the town residents took justice into their own hands.

The 1993 murder of Stephen Lawrence exposed institutional racism in the Met Police and forced a historic rewrite of British law.

Related topics: 14th Pride of Britain Awards, 1981 England riots, 1991 Craigavon killings, 1992 Sinn Féin Headquarters shooting, 1993 Bishopsgate bombing

Explore the chilling 2014 disappearance of Lars Mittank, who vanished after sprinting from a Bulgarian airport. Was it a head injury, medication, or a real threat?

Related topics: Antibiotic, Berlin, Cefprozil, Cephalosporin, Closed-circuit television camera

Explore how the Bear Brook murders went from a cold case to a forensic revolution, unmasking a serial killer with a dozen faces.

Related topics: 55-gallon drum, ABC News (United States), Allenstown, New Hampshire, Ancestry.com, Anemia

Explore the 34-year mystery of Olof Palme's assassination, from botched police work and wrongful convictions to the enigma of the 'Skandia Man'.

Related topics: .357 Magnum, Abdul Karim Bangura, Abdullah Öcalan, Acquittal, Adolf Fredrik Church

Discover how the Lucchese crime family pulled off the largest cash robbery in U.S. history and why the mastermind killed almost everyone involved.

Related topics: 10th & Oregon Crew, 116th Street Crew, 2007 John F. Kennedy International Airport attack plot, A&E (TV network), Accidents and incidents at John F. Kennedy International Airport

Discover the 1946 'Moonlight Murders' that paralyzed a town, baffled the Texas Rangers, and inspired the cult classic film 'The Town That Dreaded Sundown.'

Related topics: .25 ACP, .32 ACP, .32 caliber, African-American, Arkansas

Explore the decades-long hunt for the Golden State Killer, a former police officer eventually unmasked by revolutionary genetic genealogy breakthroughs.

Related topics: Joseph James DeAngelo