Police will work to determine if the remains are human and how old they are.
Huaki's resignation sparked the council's second by-election in six months, expected in early August at a cost of at least $60,000.
The car becomes airborne before nose-diving and rolling nine times.
Video of the encounter has been shared on TikTok.
Police say initial reports indicated a firearm had been shot in the area.
Eighty-nine percent of families endorsed a merger instead.
Police also found a vehicle nearby that had evidence of other commercial burglaries in the Hamilton area over the weekend.
Police believe the person is likely to have sustained burns.
"I don't even know what to say or how to feel."
