A driver who parked illegally in a blue-badge bay threatened a parking enforcement officer during a busy market day.
The incident happened at 9.45am on 11 May in Market Square, Salisbury.
Wiltshire Police said the driver of the silver car continued to shout and swear at the victim before driving off.
PC Dave Jones said: "It was a market day so there will have been a number of people in the area at the time".
Officers have asked any members of the public who saw the incident to come forward and contact PC Jones on 101 quoting reference 54190045017. Alternatively call Crimestoppers 0800 555 111 anonymously.