According to police, the offender assaulted the victim before others in the victim's vehicle pulled him away and drove off, pursued by the offender. Round two took place when the offender allegedly emerged from his vehicle swinging a baseball bat.
He was overpowered by members of the victim's family, however, and was kicked and punched as he lay on the ground. A 16-year-old boy then allegedly used the bat to strike him on the back of his head, splitting his scalp and rendering him unconscious.
The injured man was taken to Kaitaia Hospital but discharged himself, against medical advice.
The teenager has been charged with inflicting grievous bodily harm, police saying further arrests were expected.