The record

Disappeared

Inventors and scientists whose deaths or disappearances are called suspicious, with what the official record says beside what people suspect. Some are genuinely unsolved. Some were solved, and the story online never caught up. One man was found alive. Every fact links to its source.

Cases
8
documented so far
Unsolved
2
no finding either way
Cause found
5
coroner, court or inquiry
Work seized or destroyed
2
by an authority, on record
Unsolved Official cause found Found alive Work seized or destroyed

  1. Louis Le Prince

    disappeared 1890Unsolved

    Motion pictures. Shot some of the earliest surviving moving pictures, in Leeds in 1888.

    What happened
    After visiting his brother in Dijon, he boarded a train for Paris on 16 September 1890, shortly before he was due to show his films in public. He never arrived. No body or luggage was found, despite searches by French police, Scotland Yard and his family.
    Official finding
    None. He was legally declared dead in 1897.
    What people suspect
    His widow came to believe Thomas Edison was behind it after seeing Edison's Kinetograph; other theories point to a family dispute over a will. Historians note there is no hard evidence tying Edison to the disappearance.

  2. Rudolf Diesel

    disappeared 1913Unsolved

    Engines. Invented the compression-ignition engine that carries his name.

    What happened
    On a night crossing from Antwerp to England aboard the steamer Dresden in September 1913, he went to his cabin around 10 pm and was not seen alive again. His folded overcoat was reportedly found by the rail. A body later found in the sea was identified from personal effects, but the body itself was not recovered.
    Official finding
    None beyond death at sea. No cause was established.
    What people suspect
    Theories include suicide (accounts cite financial and health trouble), an accident, and foul play by commercial or military rivals. None has been proven.
    Where sources disagree
    Accounts differ on where and when the body was found (about ten days to two weeks later; off the Dutch coast in most accounts, near Norway in one).

  3. Ettore Majorana

    disappeared 1938Found alive

    Theoretical physics. Predicted the particles now called Majorana fermions.

    What happened
    He vanished in March 1938 after buying a ferry ticket between Palermo and Naples. For decades it was one of physics' great mysteries.
    Official finding
    In February 2015 Rome prosecutors closed the case, concluding he was alive in Valencia, Venezuela, between 1955 and 1959 under the surname Bini, based on a 1955 photograph and other evidence. They found no evidence of a crime.
    What people suspect
    Prosecutors said the most likely explanation is that he chose to disappear. Earlier theories ranged from suicide to kidnapping.
    Where sources disagree
    Reports differ on the names of the witness and the man in the photograph.

  4. Nikola Tesla

    died 1943Official cause found

    Electrical engineering. Alternating-current systems, the induction motor, wireless power experiments.

    What happened
    He died in his New York hotel room in January 1943, aged 86.
    Official finding
    Death from natural causes. His papers were examined within weeks by a team including MIT's John G. Trump, who reported finding nothing of significant value to the country.
    What people suspect
    The quick seizure of his papers, and items his family said were missing, fed long-running claims that a breakthrough was taken. The examining report, released by the FBI, says otherwise; what finally became of every item is not recorded in that file.
    Work seized or destroyed
    The U.S. Office of Alien Property took custody of his papers after his death.

  5. Wilhelm Reich

    died 1957Official cause found

    Psychiatry and "orgone" research. Psychoanalyst who later claimed to have found a life energy, "orgone", and built accumulators for it.

    What happened
    Convicted of contempt for violating the injunction, he was sentenced to two years and died in the federal prison at Lewisburg, Pennsylvania, in November 1957, shortly before he could apply for parole.
    Official finding
    Heart failure.
    What people suspect
    Supporters see the injunction, the book burning and his death in custody as persecution. His orgone claims were not supported by evidence; the burning of books by court order is a documented fact either way.
    Work seized or destroyed
    After an FDA injunction he refused to answer, a federal court ordered his books and devices destroyed; several tons of his publications were burned in 1956.
    Where sources disagree
    Sources give different dates for when the injunction was first obtained.

  6. Stanley Meyer

    died 1998Official cause found

    Alternative fuel. Claimed a "water fuel cell" could run a car on water.

    What happened
    He collapsed at a restaurant in Grove City, Ohio, in March 1998; by his brother's account he said he had been poisoned.
    Official finding
    The Franklin County coroner found a ruptured cerebral artery aneurysm, and police found no evidence of foul play. Earlier, an Ohio court had found him liable for "gross and egregious fraud" toward investors, with expert testimony that his cell was conventional electrolysis.
    What people suspect
    Viral posts say he was poisoned or killed by the Pentagon. Fact-checkers found no evidence, and the Pentagon said it had no information on him.

  7. Don C. Wiley

    died 2001Official cause found

    Structural biology. Harvard scientist who mapped how the immune system recognises viruses.

    What happened
    Reported missing in Memphis in November 2001; his rental car was found on a bridge and his body was later recovered from the Mississippi River. His death was one of several in 2001 to 2002 that press reports grouped as a "cluster" of microbiologist deaths.
    Official finding
    Forensic experts concluded he most likely fell from the bridge after a dizzy spell; his family said he had a seizure disorder that could cause dizziness. No investigation found a homicide.
    What people suspect
    The timing, weeks after the 2001 anthrax letters, fed theories linking him and others on the "cluster" lists. Several deaths on those lists had ordinary, documented causes, and some were not microbiologists at all.

  8. Eugene Mallove

    died 2004Official cause found

    Cold fusion advocacy. MIT-trained science writer and editor who championed cold-fusion research.

    What happened
    Beaten to death in May 2004 at his family's rental house in Norwich, Connecticut, while clearing it out after evicting the tenants.
    Official finding
    A solved homicide: a jury convicted one man of murder; the tenants' son pleaded guilty to manslaughter; a third person was also charged. Police treated it as a dispute over the eviction and robbery. Two men first charged were exonerated after a clerical error came to light.
    What people suspect
    Because of his cold-fusion work, theories circulated that he was silenced. The court record ties the killing to the eviction dispute.

How this list works

  • A case goes on only with sources a reader can open. Where sources disagree, the page says so.
  • The official finding is shown as plainly as the suspicion. A theory is attributed to whoever holds it, never stated as fact, and nobody is named as responsible for a crime they were not convicted of.
  • “Unsolved” means no finding either way. It is not a claim that someone was killed.
  • Know a case that belongs here, or a correction? Send it with sources to sandon@hivejournal.com.

Sources last checked 24 October 2026.

Disappeared: inventors and scientists, and what the record shows | HiveJournal