Teenager Raonaid Murray was stabbed and killed 50 yards from her home in Dublin after a night out. 20 years later, the case remains unsolved.
A family of four was brutally slain inside their home. The killer made no effort to conceal his identity, yet he was never caught…
In 1937, the mutilated body of Pamela Werner was found near the Fox Tower in Peking (now Beijing). Her death remains unsolved to this day.
Was The Monster of Florence acting on orders of a cult or a Sardinian crime family? Could he also be the elusive American Zodiac Killer?
A lone killer hunted young lovers in parked cars, on moonless summer nights in the Tuscan countryside over the span of two decades.