At around 4pm on Saturday 18 August, a man approached a parked vehicle on Morrell Way in Armadale. The man used an unknown object to remove both registration plates before leaving the scene.
Police have released CCTV images of a man who they believe may be able to assist with their investigation.
The man is described as: light skinned, slim build with long dark hair and facial hair. The man was wearing a flannel shirt over a black top, grey track pants and a black beanie.
If you have any information about the identity of this man or details of this offence please contact Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au. You can remain anonymous if you wish and rewards are available once charges are laid. Please quote Reference Number 11580.