Christchurch police say the injuries of suspected hit and run victim who died on Thursday are not consistent with a vehicle accident and he may have fallen.
Warren Noel Blackett, 44, had been in a critical condition in hospital since he was found with head injuries on Wednesday morning in a driveway on Yaldhurst Road.
Detective Senior Sergeant Tony Hill says preliminary findings from a post-mortem examination indicate Mr Blackett's injuries are not consistent with a hit and run as first thought and are unlikely to have come from an assault.
He says there is no evidence of foul play and homicide has been ruled out.