A jury deliberated less than two hours before convicting Aimee Leonard on felony counts of involuntary manslaughter and child endangering. Leonard, 29, was returned to the Butler County Jail to await sentencing Nov. 30. Common Pleas Judge Matthew Crehan could sentence her to anywhere from three years to 15 years in prison.

Investigators said that Leonard and her son, Justin Johnson Jr., were staying at a mobile home in Madison Township, near Middletown, when the boy died in the fire Feb. 4.

Investigators said Leonard set fire to a shirt after a telephone argument over weekend visitation with her boyfriend, the child's father, Justin Johnson, 30, of Middletown. She then threw the burning shirt toward the front door and ran out the back door of the mobile home, leaving her son sleeping in his crib, authorities said.

Neighbors tried to save the child but were driven back by flames.

The baby died of carbon monoxide poisoning from the smoke, the Butler County coroner said.

Leonard had pleaded innocent, saying she had not meant to hurt her son.