At around 10.40pm on Saturday 14 March 2020 a man attended a fast food restaurant drive through on Nicholson Road in Harrisdale.
After being served the man became aggressive, abusing restaurant staff and disrupting other drive through customers before walking away.
A short time later the man returned to the drive through, getting in between a vehicle and the drive through window, and threw a punch which hit a staff member on the chin.
Police have released a CCTV image of a man who they believe may be able to assist them with their investigation.
The man is described as: fair skin, solid build, with shaved hair and a light brown beard, wearing a black and khaki t shirt with white motif and a tribal tattoo on his right elbow.
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 9606