Police were looking for a passenger who was in the same car as Tongan teen Sosiua Helotu Ula, who died after falling out of the vehicle in Porirua on Sunday.
Police believed Ula, 19, fell out of a black Mercedes on Warspite Ave just before 4pm on Sunday.
Senior Sergeant Christiaan Barnard said Ula died in hospital on Tuesday of his injuries.
The black Mercedes was seized by Police on Sunday evening. It was seen in the Waitangirua area that afternoon.
The driver of the Mercedes, registration GPW495, was arrested and has appeared in court charged with driving while disqualified and supplying methamphetamine.
The second person of interest is the driver of a silver Mazda RX8, seen at the Waitangirua shops just before 4pm on Sunday, which was then seen driving at speed in Warspite Avenue behind the Mercedes.
We believe the driver of this car has information that will assist Police with the homicide investigation.
Barnard was appealing for both the passenger in the Mercedes and the driver of the Mazda to come forward and speak with Police, along with anyone who saw either of these two vehicles in the Waitangirua area on Sunday afternoon who has not yet spoken with us.
If you can help, please call Wellington Police Crime Squad on (04) 381 2000.
Information can also be provided anonymously via Crimestoppers on 0800 555 111.
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