When relationships go bad and one partner becomes obsessive, the gruesome fact is that, sometimes, the victim can pay the ultimate price.
There won't be a season 2, the show has ended.
The documentary takes a detailed look at the disappearance of 3-year-old Madeleine McCann, who vanished while on holiday with her family.
The notorious Cecil Hotel grows in infamy when guest Elisa Lam vanishes. A dive into crime's darkest places.