News Summary
The mysterious death of 67-year-old Mary Hardy Reeser in St. Petersburg remains unresolved 72 years later. Found completely reduced to ashes in her apartment, the investigation concluded without suspects or clear forensic evidence. Theories have arisen, including spontaneous human combustion and the ‘Wick Effect,’ as investigators ruled out typical fire causes. Reeser’s case continues to intrigue and puzzle those familiar with the bizarre circumstances of her demise.
St. Petersburg – The peculiar circumstances surrounding the death of 67-year-old Mary Hardy Reeser, a widow, remain a mystery nearly 72 years after she was found deceased in her apartment on July 2, 1951. The investigation concluded without any suspects or forensic evidence, leading to various theories, including the controversial concept of spontaneous human combustion.
Mary Reeser’s apartment showed minimal damage despite her body being completely reduced to ashes, with only her left foot, still clad in a slipper, found amidst the remnants. This peculiar finding has sparked numerous discussions, as while the room was left in significant disarray, particularly a four-foot area of heavy smoke damage, much of the furniture remained untouched by flames.
Reeser had previously experienced personal loss, having lost her husband, Dr. Richard Reeser, in 1947. To cope with her loneliness and to be closer to her family, she relocated to St. Petersburg in the fall of 1950. Despite the move, her feelings of isolation persisted, as she often felt unhappy and resented her role in babysitting her son’s children.
Final Day and Discovery
On the evening of July 1, 1951, Dr. Richard Reeser Jr. visited his mother and found her visibly upset about canceling a planned trip. Following this meeting, Reeser took Seconal pills and reported feeling unwell. It was the next morning that her landlady discovered signs of a fire in the apartment when the doorknob was too hot to touch.
Upon arrival, firefighters found the apartment filled with smoke. The investigation revealed that Reeser’s remains consisted of nothing more than a pile of ashes, with some fragments of metal and glass situated nearby. Observations made during the investigation noted a circular burn area on the rug under her chair, along with remnants of what was interpreted as human fat.
Investigation Findings
Investigators ruled out possible causes for the fire, dismissing theories such as lightning strikes, electrical failures, or gas leaks. The FBI suggested that Reeser likely caught fire after falling asleep with a lit cigarette, causing her nightgown to ignite. The inquiry further posited the “Wick Effect,” whereby body fat could have accelerated the combustion process.
Despite the FBI’s conclusions, they admitted that no evidence of accelerants was found, leaving many questions unanswered. The incident has since fueled various theories, from spontaneous combustion to the idea of an external ignition source.
Reeser’s Legacy and Ongoing Speculation
In 1987, additional research brought forth the idea that significant destruction of human bodies could occur under extreme conditions, potentially providing clarity to Reeser’s remains. The report aimed to debunk myths regarding the alleged shrinking of her skull, suggesting instead that it may have burst due to the intensity of the fire.
Dr. Richard Reeser Jr. accepted the FBI’s findings, noting they resonated with observations about body combustion, leading to a reluctant acceptance of the proposed explanations surrounding his mother’s death.
Mary Reeser was laid to rest at Chestnut Hill Cemetery in Pennsylvania, where family members continue to claim they feel her presence within their home long after her passing. The unusual circumstances of her death, coupled with the mysterious elements explored throughout the investigation, have left a lasting impact on local lore, with many still pondering the validity of theories surrounding spontaneous human combustion.
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The Mysterious Death of Mary Hardy Reeser in Florida
Additional Resources
- St. Pete Catalyst: The Strange Case of Mary Reeser
- Wikipedia: Spontaneous Human Combustion
- Click Orlando: Mysterious Death in Florida History
- Google Search: Mary Reeser
- WFLA: Cause of Woman’s Disintegration
- Encyclopedia Britannica: Mary Reeser
- Daily Kos: St. Pete’s Homegrown Mystery
- Google Scholar: Spontaneous Human Combustion
- HowStuffWorks: Pyrokinesis
- Google News: Spontaneous Human Combustion

Author: STAFF HERE PETERSBURG WRITER
The ST PETERSBURG STAFF WRITER represents the experienced team at HEREStPetersburg.com, your go-to source for actionable local news and information in St Petersburg, Pinellas County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Grand Prix of St. Petersburg, Localtopia, and SHINE Mural Festival. Our coverage extends to key organizations like the St. Petersburg Area Chamber of Commerce and St. Pete Downtown Partnership, plus leading businesses in finance, manufacturing, and healthcare that power the local economy such as Raymond James Financial, Jabil, and Bayfront Health St. Petersburg. As part of the broader HERE network, including HEREJacksonville.com, HEREOrlando.com, HERETallahassee.com, and HERETampa.com, we provide comprehensive, credible insights into Florida's dynamic landscape.


