Mariah Thomas, 28, pleaded guilty to first-degree endangering the welfare of a child resulting in death and received a 13-year prison sentence after a plea deal that dismissed a first-degree murder charge. The sentence follows the Feb. 9, 2024 discovery of her one-month-old daughter, identified publicly as Za’riah Thomas, with severe burns inside a Kansas City home. Investigators reported clothing that appeared melted onto a diaper and a heavily burned blanket; Thomas agreed to a blood sample and cellphone access during the investigation.
Missouri Mother Sentenced to 13 Years After Plea Deal in Case of Infant Found With Severe Burns
Mariah Thomas received a 13-year prison sentence after pleading guilty to endangering the welfare of a child resulting in death. A first-degree murder charge was dismissed under her plea agreement.
Mariah Thomas, 28, has been sentenced to 13 years in the Missouri Department of Corrections after pleading guilty to first-degree endangering the welfare of a child resulting in death, a Jackson County court record shows. A separate first-degree murder charge was dismissed as part of the plea agreement.
The sentence follows the Feb. 9, 2024 discovery by Kansas City officers of a one-month-old infant who had suffered severe burns inside a home. Kansas City Fire Department personnel pronounced the child dead at the scene.
The punishment came more than two years after Kansas City police found Thomas' infant daughter dead with severe burns inside a city home.
What Authorities Say Happened
According to charging documents and the probable cause statement, investigators were told Thomas went to put her daughter down for a nap and "accidentally placed her in the oven instead of the crib." A relative later told detectives Thomas said, "I thought I put [her] in her crib and I accidentally put her in the oven."
Investigators reported the infant—identified publicly by local media as Za’riah Thomas—was wearing a bodysuit over a diaper and that the clothing appeared to have melted onto the diaper. Officers also recovered a heavily burned baby blanket in the living room.
A baby monitor camera sits above a crib in a nursery in a California home.
Legal Proceedings and Sentence
Thomas initially declined to speak with detectives after being advised of her rights, but she agreed to provide a blood sample and to allow investigators access to her cellphone data, court records state. Prosecutors originally charged Thomas with first-degree endangering the welfare of a child resulting in death and later added a first-degree murder count that was dismissed under the plea deal.
"We acknowledge the gruesome nature of this tragedy, and our hearts are weighted by the loss of this precious life," then-Jackson County Prosecutor Jean Peters Baker said when the case was first announced.
Judge Sarah A. Castle found Thomas entered her guilty plea freely and voluntarily, understood the charge and consequences, and did not assert a mental disease or defect defense. Under the sentence, Thomas will receive credit for time already served, was given no probation, and was returned to the custody of the Jackson County sheriff to await transfer to the state prison system.
The judge ordered a $68 payment to Missouri's Crime Victims' Compensation Fund and waived other court costs. Jackson County prosecutors did not immediately provide additional comment when contacted by reporters.
Case Context
The case drew attention because of both the severity of the infant's injuries and the reported account that the child had been placed in an oven. The plea resolves the most serious criminal exposure in the case—murder—while resulting in a lengthy prison term for the defendant.
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