Over a third of such crimes remain unsolved, and even more, without a resolution. Afterwards, the victims' families and friends remain trapped in the living nightmare of never knowing what happened or, even worse, knowing that the murderer got away. Even officers of the law can become obsessed with such cases - haunted forever by the mysteries whose many threads they could not unwind.

it's about true crime , about true stories , it's about serial killers around a world.