Alan Turing’s Death: Suicide Not Supported by Evidence?


In the week that would have seen Alan Turing turn 100, a claim has been made that Turing, who was widely understood to have committed suicide through ingestion of cyanide, may in fact have died accidentally.

This claim was made at a conference in Oxford on Saturday by Turing expert Prof Jack Copeland, Director of The Turing Archive for the History of Computing in New Zealand. Copeland claims that the 1954 inquest into Turing’s death drew unsupported conclusions. Indeed, Copeland argues, it appears at least just as likely that Turing fell victim to an accidental death.

Reports the BBC:

It is widely said that Turing had been haunted by the story of the poisoned apple in the fairy tale of Snow White and the Seven Dwarfs, and had resorted to the same desperate measure to end the persecution he was suffering as a result of his homosexuality.

But according to Prof Copeland, it was Turing’s habit to take an apple at bedtime, and that it was quite usual for him not to finish it; the half-eaten remains found near his body cannot be seen as an indication of a deliberate act.

Indeed, the police never tested the apple for the presence of cyanide.

Moreover, Prof Copeland emphasises, a coroner these days would demand evidence of pre-meditation before announcing a verdict of suicide, yet nothing in the accounts of Turing’s last days suggest he was in anything but a cheerful mood.

He had left a note on his office desk, as was his practice, the previous Friday to remind himself of the tasks to be done on his return after the Bank Holiday weekend.

Nevertheless, at the inquest, the coroner, Mr JAK Ferns declared: “In a man of his type, one never knows what his mental processes are going to do next.” What he meant by “of his type” is unclear.

Prof. Copeland argues that, far from the depressed figure historical biographies have so far painted for us, Turing was in fact enjoying life — despite the persecution he had suffered — as a man at the height of his intellectual powers. Instead, Copeland argues, Turing may have been a victim of his own fervor.

Turing, experimenting with potassium cyanide in a tiny spare room in his house, may have accidentally inhaled cyanide vapors because, even though he was a man of great intellect, he had shown a propensity to be somewhat reckless. Copeland notes that the room in which Turing conducted his experiments, dubbed “the nightmare room,” had a strong odor of cyanide following Turing’s death. He also points out that the distribution of cyanide in Turing’s organs as shown by the inquest was more consistent with inhalation then ingestion.

Copeland is quoted as saying that Turing’s inquest should be reopened, adding, ”It would be a terrific thing to do. I think the nation owes it to Turing, in the Second World War he saved the nation.”

Copeland has stressed however that a focus on Turing’s work, rather than the circumstances of his death, should always be paramount.

During World War II, Turing worked at Britain’s code-breaking center Bletchley Park where he built on existing research to create a number of methods for breaking German ciphers, including his most noted method dubbed “the bombe,” which allowed Britain to crack the Enigma code.

Post war, Turing authored a paper on computational theory that is today credited as the grounding for much of modern computing. Turing also tackled the notion of artificial intelligence and proposed an experiment that became known as the Turing test–a standard by which a machine could be called intelligent. Turing would also go on to write about the chemical basis of morphogenesis, or how patterns form in nature. His contribution to the field is considered seminal.

However, Turing’s life was to abruptly change when in 1952 he faced criminal prosecution for homosexuality. In order to avoid prison, he submitted to chemical castration. Turing found himself ostracized by previous colleagues and entirely shut out of his governmental work. Turing died in 1954, just a little over two weeks before his 42nd birthday. While the inquest ruled that the cause of death was suicide, close relatives and friends had always maintained that his death was accidental.

Following a concerted Internet campaign in 2009, then British Prime Minister Gordon Brown made an official public apology on behalf of the British government for the ”the appalling way [Turing] was treated.”

With the Olympic flame making its way through Britain ahead of this summer’s Games, organizers created a very special moment for all those wanting to celebrate Turing’s life when in Manchester on June 23, Turing’s 100th birthday, the flame handover was carried out over a commemorative statue of Turing.

Turing’s statue was also cloaked in a rainbow flag and flower tributes were left at the statues feet by those wishing to mark Turing’s birthday.

Turing’s birthday was also celebrated by Google. Google created a computational code breaking game or “doodle” for its homepage.


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Uganda’s Now Accepting of Gays? The Facts Say Different
Trans Man Proposes to Girlfriend at White House Pride Reception

Image used under the Creative Commons Attribution License with thanks to photoverulam.


Sue H.
Sue H5 years ago

A little late for vindication. ? Good to know that he was celebrated for his birthday.

Duane B.
.5 years ago

An interesting story ... about an interesting and remarkable man!

Elaine A.
Elaine Al Meqdad5 years ago

Well wake up and smell the coffee folks! A Hundred years ago homosexuality was comparable to being possessed! And the rest of the world didn't know of nor use the vernacular of Homophobia "Homophobic" is a modern day terminology! He's dead AND BEEN DEAD FOR A LONG TIME. Not really giving a rats diddle, what anyone calls him today!

William K.
William K5 years ago

Accidental or not, there is no excuse for the way in which this hero of the western world and visionary who ushered in the Information Age was treated, simply on the basis of his homosexuality.

BMutiny TCorporationsAreE

Thank you Susan for your comment, "I would not be typing this here without him. Neither would you."
Yes, without Alan Turing and his brilliant code work, Hitler and the Nazis could have won the war, England lost, and some of our parents died in Nazi Concentration Camps.... all of our Freedoms would have been less.

'at the inquest, the coroner, Mr JAK Ferns declared: “In a man of his type, one never knows what his mental processes are going to do next.” What he meant by “of his type” is unclear.'

Well, it's kindof clear to me, he meant "all Gay people are crazy and therefore unpredictable and prone to crazy acts, like killing themselves." This is still, therefore, ANOTHER Homophobic slur on this Great Hero. This ought to DEFINITELY be cleared up. Suicide would be understandable and forgivable; but IF IT DID NOT OCCUR, and the Verdict was the result of Prejudice and nothing else.....

Lucie G.
Lucie G5 years ago

such a shame that such a brilliant man died in this way.

Lucie G.
Lucie G5 years ago

such a shame that such a brilliant man died in this way.

Brian M.
Past Member 5 years ago

What a cruel world that someone so brilliant should die in such a meaningless fashion? Everyone needs to be much more careful about toxins in the home.

Charli S.
Charlotte S5 years ago

It is so sad that people don't accept that God created gays and if we follow the logic that God makes no mistakes then being gay is simply a variation created by God. Funny how they could use him to fight the war but abused him later. Who knows what brilliant things didn't come into being because his life was cut short. I hope in death he has found the peace he wanted in life. Why can't we simply accept people the way they are?

Sue Matheson
Sue Matheson5 years ago