A 6-year-old boy was repeatedly abused before dying late last month, and now his mother is facing criminal charges in connection with his death, KSTU-TV reports.

Utah authorities have charged 31-year-old Reyna Flores-Rosales with murder, child abuse and sexual abuse. The allegations stem from February 25, when Flores-Rosales called 911 to report that she found the child unresponsive.

Flores-Rosales told investigators that she had left the boy in the shower for nearly an hour to clean up after wearing a diaper. She claimed that she checked on him occasionally, and that during one of the checks, she found him not breathing and slumped over on the floor.

He later died at a Salt Lake City-area hospital.

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Investigators say the child’s body had evidence of significant injuries that were in different states of healing, including “full thickness burn” wounds on intimate parts of his body.

The boy also had old scars, a pattern of linear scars on his neck, burn marks on his extremities, swelling and bruising on his head and open sores on his feet and hands. An autopsy further found swelling in his brain, which contributed to his death, and a rib fracture.

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In charging documents, medical experts said “that there is not an accidental explanation for all of the above injuries and that all of the injuries suffered were the result of inflicted trauma.”

Flores-Rosales is a single mother and was the only caregiver of the boy. She also has a 10-month-old child.

A witness had reported the woman to child welfare authorities previously because of suspected child abuse. The witness would “constantly” see new injuries on the boy and would hear the woman yelling, according to the television station.

Flores-Rosales remains in jail and is being held without bail. She has a criminal history that includes “being a fugitive from justice,” according to a booking document obtained by the television station.

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[Feature Photo: Reyna Flores-Rosales/Police Handout]