History's most infamous killers are often the most elusive. Cold cases recounts in fascinating detail the story of how these crimes have been solved and, in some cases, wrongfully convicted people saved by new evidence. There are stories of criminals who were tracked down after years of believing that they had, literally, got away with murder. They include Danny Keith Hooks, who murdered five prostitutes in a crack house, and Joe Clark, a psychotic teenager who liked to break the bones of younger boys before putting them to death. They, like many others here, escaped justice for a long time, but, finally, the long arm of the law reached out and slammed them behind bars. In other cases, new evidence has come to light, often years after someone has been tried and convicted, showing perhaps that an innocent person has been languishing behind bars and that the real killer is still on the loose. Such is the case with the famous "Serial" podcast program about Adnan Syed, originally convicted of killing his high school girlfriend which led to a re-examination of evidence and a brand new trail.