Police have declared the disappearance of a four-year-old boy in the South Australian outback a major crime and say a suspect has been identified, more than four months after he went missing.
Gus Lamont was last seen playing outside his home on a remote sheep station near Yunta, about 300km (186 miles) from Adelaide, on 27 September.
His grandmother left him alone for about half an hour before checking on him, only to find the boy missing, prompting one of the largest land and air searches in the state's history.
Police said a person who lives on the property has been identified as a suspect but confirmed the boy's parents were not under investigation.
In the days and weeks after the boy was reported missing, police conducted extensive searches, covering about 470 sq km - an area roughly twice the size of Edinburgh - around his home, the Oak Park station homestead.
