1. News
  2. /
  3. Florida

Spontaneous combustion in St. Petersburg? The curious case of Mary Reeser.

Police went looking for Mary Reeser and found a pile of ashes. The unsolved mystery baffled even the FBI.
Firemen shoveled rubble at spot where disintegrated body of Mrs. Mary Reeser, left, was found in her St. Petersburg apartment. [Tampa Bay Times file photos]
Published Oct. 17
Updated Oct. 27

Before sinking into the overstuffed easy chair in the middle of her St. Petersburg apartment, a widow named Mary Hardy Reeser slipped into a nightgown and popped two sleeping pills. Hot summer air drifted through the open windows.

It was around 9 p.m. on July 1, 1951. Reeser’s only son, Dr. Richard Reeser Jr., had just kissed her goodbye after a visit. She was alone for the night and decided to enjoy a cigarette before bed.

Reeser, 67, would not be seen alive again. When the landlady, Pansy Carpenter, tried to deliver a telegram the next morning, the door to Reeser’s small apartment on 1200 Cherry Street Northeast was warm and the handle too hot to touch. Inside the charred walls, embers still crackled.

READ MORE: What’s the deal with Tampa’s ‘haunted’ Bayshore mansion?

Firefighters burst into a soot and smoke-filled apartment. Reeser was gone, and only a pile of black ashes remained.

Amid the rubble, police found coil springs from the chair and part of Reeser’s backbone. Her left foot sat in the pile, still wearing a black silk slipper. Her skull, reports say, had “shrunken to the size of a cup.”

Interior photograph of scene where Mary Reeser died. Reeser had moved to St. Petersburg from Pennsylvania several years before her death. [EVANS, JOHNNIE | St. Petersburg Times]

Firefighters found evidence of extreme heat. Bare candle wicks towered above puddles of melted wax. Smudges of smoke had stained the tops of the walls. Warped electric switches lined the room.

Lower down, the walls were clean and the electric switches looked normal. Reeser’s newspapers sat untouched. The sheets on her bed were still white.

Reeser’s story is perhaps the strangest unsolved mystery in Tampa Bay history. The case has been documented in magazine articles, documentaries and books. But questions remain.

How could a woman go up in flames without the rest of the room burning? What could have killed Mary Reeser?


Mary Reeser and her husband, Dr. Richard Reeser Sr., hailed from Columbia, Pa. A few years after her husband died, she moved to St. Petersburg to be near her son and granddaughters.

Reeser loved her family, needlepoint and entertaining. But Florida was too hot for her liking, and she missed her friends back in Pennsylvania.

Her son could tell she was upset about it on the last day he saw her. She had been too worried about taking a trip back home to eat supper.

The pills she took before he left were the only thing in her system.


No one quite knew what to make of the case. But there were plenty of ideas.

Maybe the blaze was an accident. Maybe it was a lightning strike. Maybe, one Times reader proposed in 1951, Reeser died from spontaneous human combustion.

This last theory was the one that spread furthest. Soon the “cinder woman mystery” of St. Petersburg made national headlines.

St. Petersburg Police Chief J.R. Reichart received hundreds of theories from amateur detectives. Some claim that they smelled a strange odor outside of Reeser’s home. Theorists blamed everything from the fabric of the chair cushion to napalm, phosphorus and thermite bombs.

“A ball of fire came through the open window and hit her,” read one letter. “I seen it happen.”

There was no clear answer. So, Reichart drafted a letter to the Federal Bureau of Investigation.

"Dear Mr. (J. Edgar) Hoover,” he wrote. “This fire is too puzzling for the small-town force to handle."

Police sent boxes of evidence to the FBI laboratory in D.C., including “portions of the apartment rug, smoke samples, rubble from the walls and floor and segments of the chair.” FBI agents spent three weeks examining Reeser’s mysterious disappearance.

Finally, on August 8, Reichart released a statement to the media, calling it “the most unusual case I’ve seen during my almost 25 years of police work in the City of St. Petersburg.”

FBI agents found no evidence that suggested lightning had struck Reeser or the building. All of the fuses in the apartment were still intact. And investigators hadn’t been able to detect substances that could have started the blaze.

“Common combustible fluids and accelerants such as alcohol, gasoline, etc. would probably be consumed in such a fire and no trace of them detected afterward,” read Reichart’s statement.

As for spontaneous combustion? The investigation ruled that out as well.

It’s possible that Reeser, drowsy from the sleeping pills she took, dozed off in her chair while smoking her evening cigarette. The nightgown she was wearing at the time of her death was made of rayon acetate and could have caught fire from a cigarette ash.

Reeser had weighed about 170 pounds. Human fat could have fed a fire that smoldered throughout the evening, allowing hot air and smoke to rise to the top of the room.

“Mary was a great smoker,” Ernestine Reeser, Mary Reeser’s daughter-in-law, told the St. Petersburg Times in 1991. “The cigarette dropped to her lap. Her fat was the fuel that kept her burning. The floor was cement, and the chair was by itself. There was nothing around her to burn.”

Investigators decided this kind of accidental death was the most plausible theory. But Wilton M. Krogman, an anthropologist from the University of Pennsylvania, disagreed.

Instead of shrinking, Reeser’s skull should have exploded, he said.

Then there was the cremation of the body, which would have required several thousand degrees over the course of several hours.

“I cannot conceive of such complete cremation without more burning in the apartment,” Krogman said, according to the York Daily Record.

It’s now been nearly 70 years since Reeser’s mysterious death. To this day, no one knows for sure what happened. We may never have answers.

After the FBI investigation trailed off, a portion of Reeser’s ashes were buried next to her husband in Pennsylvania. The rest stayed with her offspring in St. Petersburg.

Reeser’s family once told the St. Petersburg Times they used to feel her presence, at least up until they got rid of her old furniture.

“That’s Grandma again," they used to say when a breeze rolled by. "Don’t worry. She’s nice.”

Times senior researcher Caryn Baird contributed to this report. This story was compiled using Times archives.


  1. The sun sets in the Everglades just east of Naples as seen from the Tamiami Trail. J. PAT CARTER  |  Associated Press
    The environmental challenges of preserving a place that meant so much and drew so many of us here should serve as a rallying cry for all Floridians.
  2. Tampa resident, Ann Turner Cook and Mike Dermo, vice president of field sales for Gerber Products Co., celebrate Gerber's 80th anniversary at the Grand Hyatt Tampa Bay in 2008. Times (2008)
    Widely known for appearing on baby-food jars, Cook taught for 26 years before retiring to become a mystery writer.
  3. A view of the Perseid meteor shower in 2013.  Scientists are predicting a rare meteor outburst this week that may be brief but incredibly intense. [Associated Press]
    Hundreds of shooting stars may be visible as Earth plows through the dusty tail of an unidentified comet.
  4. Bins filled with products move on conveyor belts at the Amazon Fulfillment Center in Ruskin. Amazon just announced it will open a similar center in Auburndale, Fla. (Times | 2018) Tampa Bay Times
    The new center will span more than 1 million square feet and be No. 11 in the state.
  5. Authorities say Rocky Ali Beamon strangled and stabbed 27-year-old Nicholas Anderson in January 2017 when they shared a cell at the Santa Rosa Correctional Institution in Milton. Florida Department of Corrections
    Rocky Ali Beamon previously had been sentenced to life in prison for a 2005 murder in Hillsborough County.
  6. The Bookstore at the  Oxford Exchange during its First Friday event on 09/06/13. TIMES (2013)  |  Tampa Bay Times
    Plus other Instagram-worthy spots around Tampa Bay.
  7. Check for the latest breaking news and updates. Tampa Bay Times
    The FDLE is investigating the incident, during which deputies shot the driver.
  8. The David A. Straz Jr Center for the Performing Arts in Tampa was one of several buildings named for the philanthropist and banker. [DENNIS JOYCE   |   Times] DENNIS JOYCE  |  Tampa Bay Times (2018)
    The David A. Straz Jr Foundation donated more than $33 million to dozens of organizations in nearly 20 years
  9. A sinkhole opened up beneath a phosphogypsum stack at Mosaic's Mulberry plant in 2016, draining 215 million gallons of waste into the aquifer below. Neither the company nor the state Department of Environmental Protection notified the public until a television report revealed what happened. [JIM DAMASKE   |   Times (2016)]
    Problem at Bartow plant began in October, but public was given no notice.
  10. In this Thursday, Aug. 1, file photo, Amanda Kondrat'yev, the woman accused of throwing a sports drink at U.S. Rep. Matt Gaetz in June outside a town hall meeting, arrives at Winston Arnow Federal Court House in Pensacola, Fla. Kondrat'yev has been sentenced to 15 days in federal custody for throwing the sports drink at Gaetz. TONY GIBERSON  |  AP
    Amanda Kondrat’yev pleaded guilty to assault in August and had faced up to a year in jail.