A Locked Room, A Glass, and a Note
On August 22, 2005, what looked like a tragic suicide quickly became something far more disturbing.
In a quiet home in upstate New York, Stacey Castor called 911 in a panic. Her husband, David Castor, was locked inside their bedroom and not responding.
When police forced their way inside, they found David dead on the bed.
Next to him sat a glass containing an unknown liquid.
Nearby… a note.
At first glance, the scene told a clear story: a man had taken his own life.
But as investigators would soon discover, this case was anything but simple.
A “Normal” Life—At Least on the Surface
To understand what happened, investigators first had to understand the people at the center of it.
By 2005, Stacey Castor appeared to be living an ordinary life. She was a working mother with two daughters and had remarried just two years earlier. Her husband, David, worked as an air conditioning technician—steady, practical, and by most accounts, quiet and reliable.
Their home life seemed typical. A blended family. Daily routines. Nothing that stood out as unusual.
But there was one detail in Stacey’s past that would later take on a much darker significance.
Before David, Stacey had been married to another man—Michael Wallace.
The First Death No One Questioned
In 2000, Michael Wallace died suddenly.
At the time, his death was ruled a heart attack.
There were no signs of foul play. No investigation that extended beyond standard medical conclusions. It was treated as a tragic but natural loss.
Stacey, now a widow with two young daughters, eventually moved on.
She remarried.
Life continued.
For years, no one questioned what happened to Michael Wallace.
The Glass That Changed Everything
Back in 2005, investigators began processing the scene of David Castor’s death.
The glass found near his body was collected and sent for testing. Toxicology would reveal exactly what he had consumed—and whether it matched the apparent suicide narrative.
The results were shocking.
The liquid in the glass—and in David’s system—was antifreeze.
Antifreeze contains ethylene glycol, a highly toxic substance that causes organ failure when ingested. While it has a deceptively sweet taste, it is not something someone would typically consume without hesitation.
Even more importantly, antifreeze poisoning is not instantaneous. It unfolds over time, causing symptoms like confusion, nausea, and severe physical distress.
This raised immediate questions.
Would someone willingly ingest enough antifreeze to die?
And if they did—what would that process have looked like?
The Details That Didn’t Add Up
Investigators began looking closer.
They tested the glass for fingerprints. If David had consumed the liquid himself, his prints should have been clearly present.
They analyzed the note. Did it match his writing style? His emotional state? His circumstances?
They documented everything in the room—including something unusual.
A turkey baster in the garbage.
It may sound insignificant, but investigators are trained to notice objects that don’t belong. A turkey baster in a bedroom, near a deceased individual, was enough to warrant collection and testing.
At this point, nothing definitively ruled out suicide.
But the case was no longer simple.
A Second Death… With the Same Cause
As investigators dug deeper, they uncovered something that changed the direction of the entire case.
This wasn’t the first time Stacey Castor had lost a husband.
And now, with antifreeze identified as the cause of David’s death, they made a critical decision—to revisit the death of Michael Wallace.
His body was exhumed.
Years after being buried, forensic testing was performed.
The results were undeniable.
Michael Wallace had also been poisoned with antifreeze.
From Tragedy to Pattern
At this point, investigators were no longer looking at isolated incidents.
They were looking at two deaths.
Same method.
Same household.
Same person at the center.
What once appeared to be tragic coincidences now looked like a pattern.
And that pattern led directly back to Stacey Castor.
The Most Shocking Twist: Ashley Wallace
Just when it seemed like the case couldn’t get more disturbing, it did.
In 2007, Stacey’s teenage daughter, Ashley Wallace, was found unconscious.
She had ingested a combination of alcohol and pills.
At first, it appeared to be a suicide attempt.
But then investigators found a note.
A typed confession.
In it, Ashley allegedly admitted to killing both her father and her stepfather—and expressed overwhelming guilt.
If true, it would have rewritten the entire case.
The Detail That Broke the Case Open
Investigators traced the note back to a computer in the home.
They checked the file.
They checked the timestamp.
And that’s when everything fell apart.
The document had been created while Ashley was at school.
She couldn’t have written it.
Which meant one thing:
Someone else did.
The Truth Comes Together
With that discovery, the case shifted completely.
Investigators now believed that:
- David Castor had been murdered
- Michael Wallace had been murdered years earlier
- Ashley Wallace had been poisoned
- And a false confession had been created to frame her
All of it pointing back to one person—Stacey Castor.
The Trial and Verdict
In 2009, Stacey Castor stood trial.
She was charged with the murder of David Castor and the attempted murder of her daughter.
During the trial, Ashley testified against her mother—a moment that stunned the courtroom.
The prosecution laid out the evidence: the antifreeze, the timeline, the computer records, and the staged note.
The jury reached a verdict.
Guilty.
Stacey Castor was sentenced to 51 years to life in prison. She died in 2016 while still incarcerated.
Why the Stacey Castor Case Still Haunts People
The Stacey Castor case stands out not just because of the crimes—but because of the relationships involved.
Two husbands.
A daughter.
A family that, from the outside, looked completely normal.
It’s a case that reminds us how important details are—and how quickly a simple explanation can fall apart under scrutiny.
Because sometimes…the truth isn’t what it seems.
Listen to the Full Episode
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Listen to this episode of Crime Clueless on Apple, Spotify YouTube, or wherever you get your podcasts.
If You Found This Case Compelling, You Might Also Like:
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- The Greed, Betrayal, and Ultimate Downfall of Robert Marshall a husband who had it all– wealth, status, and a picture-perfect life in Toms River, New Jersey. But beneath the surface? He was drowning in debt, tangled in affairs, and desperate for a way out. When his wife was gunned down in what looked like a random robbery, the cracks in his carefully curated life began to show. You can listen to this case here: Youtube, Apple Podcasts, Spotify, or anywhere you get your podcasts!
- Durst Things First: Murder, Lies, and Candy Aisles This two part episode covers the twisted life of Robert Durst after a torso washes up in Galveston Bay. Police unravel one of the strangest stories in true crime history. We take a look into Roberts bizarre early years, the disturbing disappearance of his wife Kathie, and more lies than we can count. Catch part 1 of this episode here: Youtube, Apple Podcasts, Spotify and Part 2 here: Youtube, Apple Podcasts, Spotify. Or anywhere you get your podcasts!
If you enjoy deep-dive true crime stories like this, follow Crime Clueless, leave a review, and share with someone who loves unraveling the details.
Final Thought
Patterns matter.
Details matter.
And when something doesn’t quite add up…
it’s worth asking why.
Have thoughts on this story or other cases you’d like to see highlighted? Share them with us in the comments or connect with us on social media. Together, we can ensure that stories like this one are never forgotten.
Don’t forget to follow us on social media, share your thoughts, and let us know what you’d like to hear about in future episodes. If you have any true crime stories of your own, send them our way crimeclueless@gmail.com to be featured on a future episode! And as always, remember: refuse to be clueless, careless, or caught off guard. Not today, murderers.
See you in the next episode of Crime Clueless!
Resources:
Sources for this episode include court records, investigative reporting, and forensic references.
ABC News. (2009, April 20). “Black widow” Stacey Castor accused in anti-freeze murder. ABC News. ‘Black Widow’ Stacey Castor Accused in Anti-Freeze Murder
ABC News. (2009, April 20). Exhumed body reveals Stacey Castor’s first husband “didn’t just die”. ABC News. Exhumed Body Reveals Stacey Castor’s First Husband ‘Didn’t Just Die’
ABC News. (2019, February 7). How detectives caught a “black widow” in her deadly web of lies. ABC News. How detectives caught a ‘black widow’ in her deadly web of lies – ABC News
ABC News. (2009). Suicide letter [PDF]. ABC News. PDF of Suicide Letter
A&E. (n.d.). Stacey Castor and other women who’ve gone to great lengths to kill their husbands. A&E. Stacey Castor and Other Women Who’ve Killed Their Husbands
CBS News. (2016, June 14). Stacey Castor, New York woman who poisoned husband with antifreeze, dies in prison. CBS News. Stacey Castor, New York woman who poisoned husband with antifreeze, dies in prison
CNYCentral. (n.d.). Recap of the Stacey Castor murder trial. CNYCentral. Recap of the Stacey Castor murder trial
CNYCentral. (n.d.). Did Stacey Castor murder her own father? CNYCentral. Did Stacey Castor murder her own father?
Haroon Siddique. (2008, January 29). Wife guilty of trying to kill husband with anti-freeze curry. The Guardian. Wife guilty of trying to kill husband with anti-freeze curry
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Youtube Video of Cross Examination. 🐞Stacey Castor Takes the Stand – Cross Examination
