Family members used cellphones to record a vicious assault which has left a 58-year-old Kaikohe man fighting for his life in Auckland Hospital.
Police say the video footage captured by two members of the victim's family was "excellent evidence" which had helped greatly in the inquiry into the assault.
A 51-year-old man has been arrested in relation to the Friday afternoon incident and charged with wounding with intent to cause grievous bodily harm.
He was remanded in custody when he appeared in the Whangarei District Court on Saturday and is due back on Wednesday.
The officer in charge of the inquiry, Detective Senior Sergeant Rhys Johnston, said police were called to a Fairview Rd address at 5.30pm. They arrived quickly and found the victim outside in a rapidly deteriorating condition.