The man who studies murder

Anthropologist Elliot Leyton takes us through the underbelly of humanity, in search of "the landscape of murder", from lovers' quarrels and drunken fights to coldly calculated mass killings. A Jack-the-Ripper tour of London takes us to convicted killers on death row. We also visit a stretch of Nevada desert notorious as a dumping ground for murder victims. Discusses motives for killing and why some developed countries, notably the U.S., are more prone to murder than others.