A 34-year-old man and a 19-year-old woman have been charged with manslaughter after allegedly leaving behind a boy in a car that was later struck by a semi-trailer.
Detectives allege the group was travelling along the Carnarvon Highway, near Injune in southern Queensland, on January 6 last year when their car rolled several times, coming to a stop on the road.
It's alleged the adults were able to free themselves but left six-year-old Riley Wells in the vehicle which was then struck by a passing prime mover.
