These unsolved murders, like the ones on the previous pages, are some of history's most famous crimes.
8. Jimmy Hoffa
In 1975, labor leader Jimmy Hoffa disappeared on his way to a Detroit-area restaurant. Hoffa was the president of the Teamsters Union during the 1950s and 1960s. In 1964, he went to jail for bribing a grand juror investigating corruption in the union. In 1971, he was released on the condition that he not participate in any further union activity. Hoffa was preparing a legal challenge to that injunction when he disappeared on July 30, 1975. He was last seen in the parking lot of the Machus Red Fox Restaurant.
Hoffa had strong connections to the Mafia, and several mobsters have claimed that he met a grisly end on their say so. Although his body has never been found, authorities officially declared him dead on July 30, 1982. As recently as November 2006, the FBI dug up farmland in Michigan hoping to turn up a corpse. So far, no luck.
9. JonBenét Ramsey
In the early hours of December 26, 1996, Patsy Ramsey reported that her six-year-old daughter, JonBenét, had been abducted from her Boulder, Colorado, home. Police rushed to the Ramsey home where, hours later, John Ramsey found his little girl dead in the basement. She had been battered, sexually assaulted, and strangled.
Police found several tantalizing bits of evidence -- a number of footprints, a rope that did not belong on the premises, marks on the body that suggested the use of a stun gun, and DNA samples on the girl's body. The ransom note was also suspicious. Police found that it was written with a pen and pad of paper belonging to the Ramseys. The amount demanded, $118,000, was a surprisingly small amount, considering that John Ramsey was worth more than $6 million. It is also interesting to note that Mr. Ramsey had just received a year-end bonus of $118,117.50.
A number of suspects were considered, but one by one they were cleared. Finally, the police zeroed in on the parents. For years, the Ramseys were put under intense pressure by authorities and the public alike to confess to the murder. However, a grand jury investigation ended with no indictments. In 2003, a judge ruled that an intruder had killed JonBenét. Then, in August 2006, John Mark Karr confessed, claiming that he was with the girl when she died. However, Karr's DNA did not match that found on JonBenét. He was not charged, and the case remains unsolved.
Helen Davies, Marjorie Dorfman, Mary Fons, Deborah Hawkins, Martin Hintz, Linnea Lundgren, David Priess, Julia Clark Robinson, Paul Seaburn, Heidi Stevens, and Steve Theunissen