Page "Perfect crime" Paragraph 8

Some crimes such as the Black Dahlia murder, the Zodiac murders of the late 1960s, the Tylenol scare of 1982, the Cleveland Torso Murderer, the 1996 murder of JonBenet Ramsey, and the Diane Suzuki case of 1985 are referred to as perfect, but the possibility always remains that a culprit will ultimately be identified.

Airplane hijacking along with a parachute escape, such as in the case of D. B. Cooper, may also qualify as a perfect crime.