Authorities say a mother placed her living toddler in a swing at a Maryland park one morning and he remained there until he was found dead of cold and thirst two days later when someone spotted the mother pushing her lifeless child in the swing.

The Charles County Sheriff's Office said Tuesday that the 3-year-old boy found in a La Plata park died of dehydration and hypothermia. Authorities called his death a homicide.

Spokeswoman Diane Richardson says the boy and his 24-year-old mother arrived at the park the morning of May 20. She says the mother put the boy, who was alive, into the swing, where he stayed until he and his mother were found the morning of May 22.

Richardson says the case will be reviewed by prosecutors.