A truck driver involved in a fatal crash in Manawatu last week has still not been interviewed by police due to the severe shock he suffered over the incident.
A mother and son died in the three-vehicle crash on State Highway 1, near Sanson and Foxton, last Wednesday.
The crash involved two large trucks and a car, and occurred just after midnight.
Central Police District communications manager Sara Stavropoulos said no charges had yet been laid over the crash.
"We haven't formally spoken to one of the truck drivers yet. Once that's been done, and the ball's rolling on that...then we'll obviously look at potential charges.''