The car, pictured above, was driving past Gorey Pier towards Gorey Common at 11:59pm on 31 October.
Jersey Police believe the driver may have important information that will assist the investigation.
They are also looking into 54 persons of interest.
In the absence of any clear suspect, this is by its nature time-consuming work – following every lead in minute detail and visiting and assessing a range of identified persons of interest.
What we know so far:
Persons of interest
Lines of enquiry
House to house searches
Calls from the public
Hours of footage from CCTV collected by the police
Anybody who knows the owner of the vehicle is asked to call the police or contact Crimestoppers anonymously on 0800 555 111.