A Tucson mother who kept her 11-year-old son locked in a stuffy room all summer with only a bucket for a toilet has been sentenced to three years of probation.

Norma Barrientos had pleaded guilty to one count of child abuse.

Pima County sheriff's deputies discovered Barrientos' son locked in a room in August after he called 911 from a cell phone to report that he was home alone.

Deputies said the room was warm, had a stench of urine and feces and had a fan that did not work. There were bars and an extra locking device on the window.

Barrientos and her boyfriend told deputies the boy was locked up because he was getting dangerous items like lighters and flammable liquids that were kept in the home.