In most murder cases, police rely on motive to pursue a killer. But when the murderer is a stranger, the crime may go unsolved for years. Investigators must employ an arsenal of forensic techniques to trace these seemingly random lethal encounters.
I de fleste tilfælde har morderen og ofret en fælles personlig historie, men når et offer fanges i en fremmeds greb, kan en forbrydelse forblive uløst i flere år.
