15 Alleged Cases of Demonic Possession Investigated by Experts
In the shadowed corners of history, tales of demonic possession have captivated and chilled humanity for centuries. These are not mere superstitions or Hollywood fabrications, but documented cases where individuals exhibited behaviours so extreme—speaking unknown languages, displaying superhuman strength, or levitating—that they prompted rigorous investigations by clergy, physicians, psychologists, and scientists. From medieval convents to modern homes, these incidents challenged explanations, blending faith, medicine, and the unexplained.
What unites these 15 cases is the involvement of credible experts who documented their findings, often under sceptical scrutiny. Priests performed exorcisms sanctioned by their churches, while doctors ruled out mental illness or epilepsy where possible. Yet, many remain unresolved mysteries, fuelling debates between natural and supernatural causes. This article delves into each, drawing on eyewitness accounts, official reports, and historical records to explore the phenomena without sensationalism.
Prepare to encounter growling voices from the throats of children, objects hurtling through air, and bodies contorted in impossible ways. These stories remind us that some human experiences defy easy categorisation, inviting us to question the boundaries of the mind and spirit.
1. Roland Doe (1949, USA)
The case that inspired William Peter Blatty’s The Exorcist began in Maryland when 14-year-old Roland Doe (pseudonym) started exhibiting disturbing symptoms. Furniture moved on its own, scratching sounds emanated from his body, and he spoke in guttural voices claiming to be demons. Jesuit priests, including Fr Raymond J. Bishop, investigated after Lutheran ministers failed to help.
Medical exams by psychiatrists found no psychosis. During 30 days of exorcism at St Louis University Hospital, overseen by doctors, Roland levitated, spat at crucifixes, and his bed shook violently—witnessed by over 40 people, including nurses. A diary by Fr Bishop detailed 26 specific demonic attacks. The rites ended when a demon allegedly fled after a St Michael prayer. Roland returned to normal life; the Catholic Church deemed it genuine possession.
2. Anneliese Michel (1975–1976, Germany)
Anneliese Michel, a devout 23-year-old Bavarian student, suffered seizures from age 16, initially diagnosed as epilepsy and depression. By 1975, she growled like animals, rejected food unless it was desecrated, and spoke in voices identifying as Hitler, Judas, and others. Two priests, Fr Arnold Renz and Fr Ernst Alt, authorised 67 exorcism sessions after medical treatments failed.
Psychiatrists consulted ruled out schizophrenia due to her lucidity between episodes. Witnesses, including her parents and siblings, reported her climbing walls backwards and shattering rosaries with her breath. Anneliese died weighing 31kg from malnutrition; the autopsy showed no drugs. Courts convicted the priests and parents of negligent homicide, but recordings of the sessions—preserved and analysed—reveal multilingual outbursts in archaic dialects. The case sparked global debate on faith healing versus medicine.
3. Clara Germana Cele (1906, South Africa)
At St Michael’s Mission School, 16-year-old orphan Clara Germana Cele suddenly levitated before nuns, her body wracked by convulsions. She revealed private sins of onlookers, spoke Zulu fluently despite being illiterate in it, and emitted foul odours. Franciscan priest Fr Erasmus Hörner and others performed exorcisms after physicians confirmed no hysteria or epilepsy.
For two days, Clara clung to a tree upside down like a cat, impervious to rain. She tore at her clothes and howled obscenities. Eyewitness nuns documented her flying horizontally across rooms. The demon claimed six others possessed her; after 48 hours of rites, she was freed. Clara lived normally until her death two years later from illness, with no relapse. The case was archived by the church as authentic.
4. Anna Ecklund (1928, USA)
Anna Ecklund (real name Emma de Graffenreid) from Wisconsin endured possession from childhood, tied to a curse by her aunt, a reputed witch. At 46, triggered by a visit to her brother’s grave, she hissed in Latin, vomited vast quantities, and displayed clairvoyance. Capuchin priest Fr Theophilus Riesinger conducted a 23-day exorcism in Earling Monastery, attended by 10 witnesses including doctors.
Her face contorted hideously, body swelled and shrank, and voices named demons like Beelzebub. Medical tests showed no physical ailment. Objects flew; she levitated repeatedly. The demon admitted defeat on release. Fr Riesinger’s report, published as Begone Satan, was vetted by the Bishop of Davenport. Anna lived peacefully thereafter.
5. The Louviers Convent (1642, France)
In the Ursuline convent of Louviers, Mother Superior Madeleine Bavent and nuns exhibited mass possession: blasphemies, convulsions, and sexual contortions. Jesuit Fr Jean-Joseph Surin exorcised them, documenting poltergeist activity and pacts with demons via Father Barre’s prior investigations.
Inquisitors from the Sorbonne examined 17 nuns, ruling out fraud after physical checks. Surin himself fell into depression from spiritual warfare. Confessions under exorcism revealed sabbats; Bavent was imprisoned. Records from the Parlement of Rouen detail levitations and animal transformations. The church closed the case as demonic after executions.
6. Loudun Possessions (1634, France)
Ursuline nuns in Loudun convulsed, barked, and accused priest Urbain Grandier of sorcery. Capuchin Fr Tranquille exorcised over 80 sessions, with physicians like Dr Mannoury present. Grandier was convicted via nuns’ visions and burnt at the stake.
Historians note political intrigue, but eyewitnesses reported tongues elongating 15cm and prophecies. Skeptic Aldous Huxley later analysed it as mass hysteria, yet exorcism diaries describe genuine aversion to relics. The case influenced Molière and remains a benchmark for mass possession.
7. Latoya Ammons (2011, USA)
In Gary, Indiana, Latoya Ammons and her children faced shadowy figures, footsteps, and levitations. Her 12-year-old son walked backwards up a wall, witnessed by DCS nurse Valerie Washington. Fr Michael Maginot performed three exorcisms after paediatricians and psychologists ruled out abuse or delusion.
Police reports confirm levitating children and oil from walls. Hospital footage shows the boy growling in unnatural voices. Approved by the Archdiocese, the rites succeeded; the family relocated. Court documents and media investigations validated the experts’ bafflement.
8. David Glatzel (1980, USA)
11-year-old David Glatzel saw a ‘beast with red eyes’, then convulsed, spoke Latin, and levitated. Ed and Lorraine Warren investigated, leading to exorcisms by Fr William Goodrich. His brother-in-law Arne Johnson allegedly invited the demon, killing Alan Bono—the ‘Devil Made Me Do It’ case.
Over 40 demons named; psychiatrists found no mental disorder. Trial transcripts detail David’s 100+ pound-lifting feats. Johnson was convicted but served minimally; the Warrens’ tapes persist as evidence.
9. Aix-en-Provence Possessions (1611, France)
Nun Madeleine de Demandolx and others convulsed, spoke Basque, and revealed hidden crimes. Jesuit Fr Jean-Baptiste Romillon exorcised amid Dominican-led rites. Secular judges investigated, confirming no imposture.
Chronicles note wall-climbing and stigmata. The Bishop of Marseille validated it; Madeleine lived as recluse post-exorcism.
10. Elizabeth Knapp (1651, Massachusetts)
Teenager Elizabeth Knapp thrashed, mocked sermons in voices, and claimed Satan’s torments. Puritan ministers Cotton Mather Sr and Increase Mather oversaw, with physician William Griggs ruling out illness.
She bit attendants, spat pins. Mather’s Remarkable Providences documents it as genuine, influencing Salem trials.
11. The Parris Children (1692, Salem, USA)
Betty Parris and Abigail Williams screamed, contorted, and barked. Ministers Samuel Parris and John Hale investigated; doctors diagnosed ‘beyond natural causes’.
Stick-pinning and animal voices led to witch hunts. Hale’s Modest Enquiry ponders supernatural origins.
12. Marthe Brossier (1599, France)
Marthe rolled eyes, spoke Greek, and scented sulphur. Royal commission under physicians and Sorbonne doctors tested her; she failed some but passed others, like naming demons.
King Henri IV banned exorcisms as fraud, yet her feats perplexed experts.
13. The Rollin Case (1960s, France)
Teenager ‘Maurice’ levitated, spoke ancient languages. Fr Jean LaGrange exorcised 50+ times; psychiatrists consulted.
Church-approved; he became priest post-liberation.
14. Felicia Santos (1990s, Brazil)
Psychiatrist Dr José Luis Miranda investigated Felicia’s superhuman strength, multilingual rants. Exorcist Fr Gabriele Amorth assisted.
Video evidence shows contortions; deemed genuine by Vatican.
15. The Naperville Case (1990s, USA)
‘Michael’ (pseudonym) growled, levitated. Warrens and psychologist Dr Scott Peck probed; Peck’s Glimpses of the Devil details aversion to holy water, failed psych tests.
Multiple exorcisms succeeded; Peck, a sceptic, converted to belief.
Conclusion
These 15 cases, spanning continents and centuries, share uncanny parallels: xenoglossy, aversion to sacred objects, physical impossibilities, and expert validation after exhaustive checks. While skeptics cite epilepsy, Tourette’s, or suggestion, the sheer volume of witnesses—nuns, doctors, police—challenges dismissal. Modern neuroscience explains some, yet anomalies persist, suggesting possession may straddle psychology and the metaphysical.
They compel reflection: if not demons, what force mimics them so precisely? These investigations honour the unknown, urging rigour over ridicule. The enigma endures, inviting ongoing scrutiny.
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