We continue our list of history's coldest cases with this list of grisly crimes.
3. Swedish Prime Minister Olof Palme
On February 28, 1986, Swedish Prime Minister Olof Palme was gunned down on a Stockholm street as he and his wife strolled home from the movies unprotected around midnight. The prime minister was fatally shot in the back. His wife was seriously wounded but survived.
In 1988, a petty thief and drug addict named Christer Petterson was convicted of the murder because he was picked out of a lineup by Palme's widow. The conviction was later overturned on appeal when doubts were raised as to the reliability of Mrs. Palme's evidence. Despite many theories, the assassin remains at large.
4. The Torso Killer
In Cleveland, Ohio, during the 1930s, more than a dozen limbless torsos were found. Despite the efforts of famed crime fighter Eliot Ness, the torso killer was never found. The first two bodies, found in September 1935, were missing heads and had been horribly mutilated. Similar murders occurred during the next three years.
Desperate to stop the killings, Ness ordered a raid on a run-down area known as Kingsbury's Run, where most of the victims were from. The place was torched, and hundreds of vagrants were taken into custody. After that, there were no more killings.
The key suspect in the murders was Frank Dolezal, a vagrant who lived in the area. He was a known bully with a fiery temper. Dolezal was arrested and subsequently confessed, but his confession was full of inaccuracies. He died shortly thereafter under suspicious circumstances.
5. Bob Crane
In 1978, Bob Crane, star of TV's Hogan's Heroes, was clubbed to death in his apartment. Crane shared a close friendship with John Carpenter, a pioneer in the development of video technology. The two shared an affinity for debauchery and sexual excesses, which were recorded on videotape. But by late 1978, Crane was tiring of Carpenter's dependence on him and had let him know that the friendship was over.
The following day, June 29, 1978, Crane was bludgeoned to death with a camera tripod in his Scottsdale, Arizona, apartment. Suspicion immediately fell on Carpenter, and a small spattering of blood was found in Carpenter's rental car, but police were unable to connect it to the crime. Examiners also found a tiny piece of human tissue in the car. Sixteen years after the killing, Carpenter finally went to trial, but he was acquitted due to lack of evidence.
Read about more of the famous cold cases throughout history on the next page.