Kansas City, Missouri — A Missouri mother will spend 13 years in state prison after pleading guilty in the death of her 1-month-old daughter, who was found with severe burns inside an oven at a Kansas City home in 2024.
Mariah Thomas, 28, pleaded guilty Tuesday to first-degree endangering the welfare of a child resulting in death, according to Jackson County court records. The plea agreement resulted in the dismissal of a first-degree murder charge that prosecutors had previously filed in the case.
Thomas was sentenced to 13 years in the Missouri Department of Corrections and was not granted probation. She will also receive credit for time already spent in custody.
Infant Found Dead at Kansas City Home
The incident happened on February 9, 2024, when Kansas City police officers were called to a home at around 1:30 p.m. following a report that a baby was not breathing.
When officers arrived, they found the 1-month-old infant suffering from apparent severe burns across her body. Kansas City Fire Department personnel pronounced the child dead at the scene.
The infant was later identified as Za’riah Thomas.
According to charging documents, investigators were told that Thomas had intended to put her daughter down for a nap but accidentally placed the baby in the oven instead of the crib.
A family member later told detectives that Thomas said:
“I thought I put [her] in her crib and I accidentally put her in the oven.”
Investigators also documented the condition of the child’s clothing and other items inside the home.
Investigators Found Evidence of Severe Burns
According to the probable cause statement, the infant was wearing a bodysuit over a diaper when she was found.
Investigators said the clothing appeared to have melted onto the diaper, while a baby blanket recovered from the living room had significant burn marks.
The circumstances prompted a major criminal investigation and initially resulted in a charge of first-degree endangering the welfare of a child resulting in death.
Thomas initially declined to speak with detectives after being advised of her rights. She later agreed to provide investigators with a blood sample and access to data from her cellphone, according to the court documents.
Murder Charge Was Later Added
The criminal case changed as the investigation and prosecution progressed.
Thomas was initially charged with first-degree endangering the welfare of a child resulting in death. Prosecutors later added a first-degree murder charge, significantly increasing the potential consequences she faced.
That murder charge, however, was ultimately dismissed as part of Tuesday’s plea agreement.
Under the agreement, Thomas pleaded guilty to the child endangerment charge and received a 13-year prison sentence.
The court did not grant probation, meaning Thomas will remain under the custody of the Missouri Department of Corrections.
Prosecutor Called Death a “Gruesome” Tragedy
When the original charges were announced in February 2024, then-Jackson County Prosecutor Jean Peters Baker described the infant’s death as a devastating case.
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Baker said:
“We acknowledge the gruesome nature of this tragedy, and our hearts are weighted by the loss of this precious life,” Baker said at the time. “We trust the criminal justice system to respond appropriately to these awful circumstances.”
More than two years later, the case concluded with Thomas’s guilty plea and prison sentence.
Judge Says Plea Was Entered Voluntarily
Judge Sarah A. Castle found that Thomas entered her guilty plea freely and voluntarily and understood both the charge and the consequences associated with it.
The judgment also states that Thomas did not raise a mental disease or defect defense during the proceedings.
Following sentencing, Thomas was returned to Jackson County sheriff’s custody while awaiting transfer to state prison. The judge also ordered her to pay $68 to Missouri’s Crime Victims’ Compensation Fund and waived all other court costs.
The case has now moved from the courtroom to the corrections system, where Thomas will serve the 13-year sentence imposed following her plea.
What are your thoughts on the sentence and the circumstances surrounding this tragic case? Share your reaction in the comments below.
