CASE FILE: Killer Sister Buries Murdered Sister In Their Own Backyard
CASE FILE: THE KAREN PAIS HOMICIDE INVESTIGATION
Killer Sister: The Woman Who Buried Her Own Sister in the Backyard
Homicide Investigation & Trial Review Report
Narrative by Detective Brian Coldwel
PROLOGUE – THE WARNING THAT CAME TRUE
In many murder investigations, the hardest question is not who committed the crime.
It is whether anyone could have stopped it.
For months before her disappearance, Karen Pais reportedly told friends the same terrifying warning:
“If something happens to me, tell them it was my sister. She is going to kill me.”
At the time, those words sounded impossible.
A family disagreement.
A sisterly conflict.
A painful but ordinary relationship breakdown.
No one wanted to believe that one sister could actually harm the other.
But in May 2021, Karen Pais disappeared from her quiet Florida home.
Her friends knew something was wrong immediately.
Karen was dependable.
She answered messages.
She stayed in contact.
When she suddenly stopped responding, those closest to her feared something had happened.
Their fears became reality when investigators discovered a disturbing scene in the backyard of Karen’s own home.
A freshly disturbed patch of dirt.
A buried body.
And a gold necklace bearing Karen’s name.
The person investigators believed was responsible was not a stranger.
Not an intruder.
Not someone from outside the family.
It was Deborah Patton.
Karen’s only sister.
The case became a disturbing examination of a family relationship that had deteriorated over years, a warning ignored by friends, and a crime that prosecutors argued was hidden literally beneath the victim’s own backyard.
CHAPTER 1 – WHO WAS KAREN PAIS?
Before becoming the victim of a homicide investigation, Karen Pais lived a quiet and structured life in Carrollwood, Florida.
She was described by friends as:
Loyal
Generous
Caring
Deeply committed to family
Karen was a retired engineer from Verizon.
She enjoyed:
Gardening
Maintaining her home
Spending time with friends
Taking care of her yard
Her friends described her as someone who valued routine.
She answered calls.
She responded to messages.
She was someone people could rely on.
That was why her sudden silence immediately caused concern.
CHAPTER 2 – THE SISTER RELATIONSHIP THAT BROKE DOWN
Karen and Deborah Patton were sisters.
They shared the same family history.
But according to people close to Karen, their relationship became increasingly strained over time.
Around 2010, Karen allowed Deborah to move into her two-bedroom home.
The decision appeared to come from family loyalty.
Karen wanted to help her sister.
But living together did not repair their relationship.
Instead, friends described a growing distance between them.
They lived under the same roof.
But they were reportedly emotionally separated.
CHAPTER 3 – THE LAST DAYS BEFORE KAREN DISAPPEARED
Karen’s final known days began like normal.
She spent time with friends.
She continued her routines.
She worked in her yard.
Her friends later testified that the last time they saw her alive was around May 20–21, 2021.
Karen was known for her gardening.
Her yard was carefully maintained.
Everything had a place.
That detail would later become extremely important.
Because the condition of her backyard helped reveal what had happened.
CHAPTER 4 – THE MISSING PERSON REPORT
On May 30, 2021, Karen’s friends reported her missing.
They had become increasingly worried.
Karen was not answering:
Calls
Text messages
Visits from friends
Her friends knew this was unusual.
They went to her home.
They saw her car.
But Karen was nowhere to be found.
Her:
Purse
Wallet
Vehicle
were still there.
The situation did not look like someone who simply left voluntarily.
CHAPTER 5 – DEBORAH’S STORY
When deputies arrived, they spoke with Deborah Patton.
Deborah claimed she did not know where Karen was.
She reportedly told investigators she did not remember the last time she saw or spoke with her sister.
But investigators noticed details that raised questions.
Karen’s belongings remained inside.
Her vehicle remained at the property.
And during a later visit, deputies noticed something unusual.
A freshly dug section of dirt in the backyard.
CHAPTER 6 – THE BACKYARD THAT REVEALED THE TRUTH
Karen’s friends knew her well.
They knew how much she cared about her yard.
A large disturbed area immediately stood out.
One friend, Deborah Wasan, testified that she confronted Deborah Patton.
She asked:
“Is Karen in that hole?”
According to testimony, Deborah did not directly answer.
She reportedly avoided the question.
The backyard became the center of the investigation.
Authorities obtained a search warrant.
Then they started digging.
CHAPTER 7 – THE DISCOVERY UNDER THE DIRT
Investigators carefully excavated the area.
Approximately two feet underground, they discovered something wrapped.
The remains were:
Covered in black trash bags
Wrapped in cloth material
Secured with bungee cords
Sealed with duct tape
Investigators reported detecting the smell of decomposition.
Inside was a human body.
Around the neck was a gold necklace.
The necklace contained the name:
“Karen.”
The discovery confirmed the worst fears of Karen’s friends.
They had found Karen Pais.
CHAPTER 8 – THE SURVEILLANCE FOOTAGE
Surveillance footage became one of the most important pieces of evidence.
A camera across the street captured activity near the home.
Investigators determined:
Karen was last seen alive on May 24, 2021.
The footage showed her outside.
She was wearing:
A purple shirt
Light-colored shorts
The same clothing was later recovered with her remains.
The video showed Karen working in her yard.
She waved at a passing neighbor.
It was an ordinary moment.
A moment that would become her final appearance alive.
CHAPTER 9 – THE ONLY PERSON LEFT AT THE HOME
After Karen disappeared, investigators reviewed who entered and exited the property.
According to prosecutors:
The only person seen returning to the home after Karen was Deborah Patton.
Surveillance reportedly showed Deborah:
Taking large black trash bags to the trash
Walking her dog
Driving Karen’s vehicle on multiple occasions
This became a central part of the prosecution’s argument.
CHAPTER 10 – THE AUTOPSY RESULTS
Initially, Deborah was arrested on a charge related to abuse of a dead human body.
But the investigation changed after the medical examiner completed the autopsy.
The findings:
Karen Pais died from a gunshot wound to the chest.
The death was ruled:
Homicide.
The injury was severe.
The bullet:
Entered the chest
Damaged the lung
Damaged the heart
Caused catastrophic internal injuries
The medical examiner testified that death would likely occur within seconds to minutes.
CHAPTER 11 – THE MURDER CHARGE
After the autopsy findings, Deborah Patton faced an additional charge:
Second-degree murder with a firearm.
The prosecution argued:
Karen was killed inside her home
Her body was hidden afterward
Deborah was the only person connected to the home after Karen disappeared
However, one major question remained:
Why?
The arrest documents did not clearly establish a motive.
CHAPTER 12 – THE WARNING KAREN LEFT BEHIND
One of the most emotional parts of the case came from Karen’s friends.
They testified that Karen had repeatedly expressed fear.
According to her friends, Karen said:
“If something happens to me, tell them it was my sister.”
She allegedly warned:
“She is going to kill me.”
Friends said they encouraged Karen to:
Move away
Ask Deborah to leave
Take precautions
But Karen refused.
Her reason:
Deborah was family.
She could not abandon her sister.
Those words became one of the most haunting parts of the trial.
CHAPTER 13 – THE TRIAL BEGINS
Deborah Patton’s trial began in 2026.
Before trial, she had been found incompetent to stand trial between 2022 and 2024.
She remained in a state mental health facility for treatment.
In February 2025, a judge ruled she was competent.
The case moved forward.
CHAPTER 14 – THE PROSECUTION’S CASE
Prosecutors argued the evidence created a clear picture.
They focused on:
Karen’s disappearance
The backyard burial
Surveillance footage
The body discovery
Deborah’s actions afterward
The prosecution argued that Deborah knew exactly where Karen was because she was responsible.
They emphasized:
Karen was found buried at her own home.
CHAPTER 15 – THE DEFENSE ARGUMENT
The defense argued Deborah was being blamed because investigators did not know what else to do.
They argued:
There was no direct eyewitness to the shooting
No clear motive was proven
Circumstantial evidence was not enough
The defense told jurors that suspicion was not proof.
They asked:
Was Deborah truly responsible?
Or was she simply the person investigators focused on because she lived there?
CHAPTER 16 – THE TESTIMONY OF KAREN’S FRIENDS
Karen’s friends became some of the most important witnesses.
They described:
The change in the sisters’ relationship
Karen’s fears
Her unusual silence before disappearance
One friend testified that messages received after Karen vanished did not sound like her.
For example, a short response such as:
“I’ll pass.”
seemed unusual.
Karen normally gave explanations.
She communicated differently.
CHAPTER 17 – THE BACKYARD EVIDENCE
The disturbed dirt remained one of the strongest pieces of evidence.
Witnesses described Karen’s yard as carefully maintained.
The unusual hole immediately stood out.
Deborah reportedly claimed she had planted a tree there and Karen wanted it removed.
But investigators argued that explanation did not match the evidence.
CHAPTER 18 – THE VERDICT
After hearing the evidence, the jury found Deborah Patton guilty.
The conviction confirmed what prosecutors had argued:
Deborah was responsible for Karen’s death.
CHAPTER 19 – THE SENTENCE
During sentencing, Deborah continued maintaining her innocence.
She stated she planned to appeal.
She said she believed the verdict was wrong.
The judge disagreed.
The court described the crime as:
Cold
Calculated
Unfathomable
The judge sentenced Deborah Patton to:
Life in prison.
FINAL NOTE – DETECTIVE BRIAN COLDWEL
The Karen Pais case is disturbing not only because of the crime itself.
It is disturbing because of the relationship behind it.
A sister.
A shared home.
A family connection that should have represented safety.
Instead, prosecutors argued that the person closest to Karen became the person responsible for taking her life.
Perhaps the most painful part of this case is that Karen’s friends said she tried to warn people.
She expressed fear.
She told others who she believed could harm her.
But because that person was family, she continued giving chances.
The case serves as a reminder:
Warnings should be taken seriously.
Fear should not be dismissed.
And family relationships do not always guarantee safety.
Karen Pais was remembered by her friends as kind, loyal, and generous.
Not just as a victim.
But as a person whose life mattered.
CASE STATUS: CLOSED – CONVICTION OBTAINED
DEFENDANT: DEBORAH PATTON
VICTIM: KAREN PAIS
SENTENCE: LIFE IMPRISONMENT
