History is filled with numerous unsolved questions, from infamous murder mysteries to other worldly unexplainable phenomena.
However a number of ominous phone calls have remained open wounds in history as theorist have struggled to piece together who exactly made the creepy calls.
From phone calls some claim were made beyond the grave, to conversations from serial killers covering their tracks, here are a number of the creepiest phone calls made throughout history.
Load of taurus
One of the most notorious US unsolved murder mysteries is the identity of The Zodiac Killer, who took the lives of five known people in the 60s in California and is suspected of more.
Using astrological symbols in letters to the police, often opening with: “This is the Zodiac speaking?” the evil fiend made a call to the workplace of victim Donna Lass, claiming she would be unable to attend her casino duties due to family issues.
Security guard Gordon Petrovich made a note of the call at the Sahara Tahoe Hotel, claiming a “Mr Davis” had rung in. Donna’s landlord was called Nick Davis, but later said it was not him on the line.
Keeping mum
Horror author Dean Koontz was baffled to receive a phone call in September 1988 in which a weak voice warned him three times: “Please be careful.” While the caller didn’t respond to his query of who it was, he was convinced the female voice sounded like his mum, who had been dead for nearly 20 years.
Two days later he was contacted by his dad Ray’s retirement home, who were concerned about his escalating violent behaviour. Requesting Dean try to help calm him, the writer dodged death when his father tried to stab him with a knife.
Sixth sense
While being driven through Dallas in a motorcade on November 22, 1963, the 35th president of the United States, John F Kennedy was assassinated by Lee Harvey Oswald. Conspiracy theories have raged over the years over whether Oswald, above top, was a patsy and whether others – such as the Mafia – were really responsible.
But in an additional creepy twist, an unidentified woman is said to have called the Brit newspaper Cambridge News 25 minutes before the murder to warn the life of JFK was in danger.
Policy puzzler
The murder of Liverpudlian insurance salesman William Wallace’s wife Julia is a true story, which sounds like it came from a novel. A phone call to Liverpool Central Chess Club on the evening of January 19, 1931, was said to have been made by a potential customer requesting a home visit the next night to discuss a policy.
The mystery caller, who named himself R M Qualtrough, left a message at the venue where Wallace, right, was a regular. It’s claimed when Wallace returned home after being unable to locate the address of Qualtrough, he found his other half beaten to death.
He was convicted of her killing but it was later overturned in the first British case where there was a re-examination of evidence. The real culprit has never been found.
Push the button from the other side
In 2008 a train crash in Chatsworth, southern California, took the life of Charles E Peck, yet as bodies were continuing to be recovered calls came from his mobile to multiple members of his family. While they could hear nothing but static and unidentifiable sounds, 35 calls in total came through leaving the relatives hopeful he was trapped in the wreckage.
But while the victim’s brother Richard tried calling back multiple times he only reached voicemail. Around an hour before Charles’ body was found the calls, which had rung throughout the night, stopped at 3.28am.
The coroner’s report stated the airline worker had died instantly. Son CJH claimed: “I think it’s a message from my dad to let us know he’s not suffering.”
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