St. Petersburg police say the child’s body was found in a home on Tanglewood Drive Northeast, just north of Shore Acres.

ST. PETERSBURG, Fla. — A St. Pete mother is facing a first-degree murder charge after her four-year-old child was found dead by his teen sister, police said.

The St. Pete Police Department responded just after 3:30 p.m. Tuesday to a call about a child who was found dead and a woman who was injured inside a home on Tanglewood Drive Northeast, just north of Shore Acres.

At the scene, St. Pete Police Chief Anthony Holloway told 10 Tampa Bay News that the sister of the child, a 16-year-old girl, arrived home from school, saw that her brother had been stabbed to death and called police. 

Authorities later identified the boy as Finley Joseph Cullom.

Police said that based on the evidence currently available in the investigation, the mother, 43-year-old Diana Cullom, stabbed the child.

The 16-year-old also found a note in the house, which police believe was left by Cullom.

“She found a note in the house, so we believe that the scene is contained within the home,” Holloway said. “We don’t believe there is any danger to anyone in the community.”

Cullom was taken to the hospital for non-life-threatening injuries. She was booked into jail around 2 a.m. Wednesday.

The father was also being interviewed by police, according to the chief.

Cullom is expected to maker her first court appearance Thursday.