BY IAN CROUCH
Police are appealing for dashcam footage as investigations continue into a multi-vehicle crash on the M1 at Cooranbong.
The four vehicle crash closed the northbound lanes of the motorway for several hours.
A 72-year-old man was placed in an induced coma and flown to the John Hunter Hospital with head and chest injuries - he remains in a critical condition.
Police say a 57-year-old man driving a white Mitsubishi 4WD was outside the vehicle at the time of the crash.
He sustained minor injuries and was taken to the John Hunter for treatment.
Anyone who witnessed the crash or who has dashcam footage is urged to call the Crash Investigation Unit on 4929 0744 or Crime Stoppers on 1800 333 000.
