The States police have said the driver of a silver VW golf and a man who was standing near the car park got into an argument at around 17:15 on Friday 12 July.
Appealing for any witnesses, they said “voices were raised” before the was driven at the man, allegedly hitting him.
The car then sped off.
The two men did not know each other and the pedestrian was not injured by the incident, the States police said.
CAN YOU HELP?
Police have appealed for anyone who saw the incident to contact them on 612612 or anonymously contact the charity Crimestoppers on 0800 555111 or at crimestoppers-uk.org.