Police are searching for a man they believe can assist with their inquiries into a shooting incident that occurred near Dwellingup on November 4.
Two men were arrested in early November, but detectives have released composite images of another man they are seeking.
Police alleged a 39-year-old woman was driving between Dwellingup and Boddington on the Pinjarra-Williams Road when she saw a man in the bush on the side of the road.
As she drove past, the man discharged a firearm which pierced the rear passenger door of her Mitsubishi Pajero near where her son was seated.
A 22-year-old man from Inglehope was charged with Aggravated Possession of Firearm, Unlicensed Person Possess Ammunition, Possess Cannabis and Cultivate Cannabis.
A 21-year-old man of Collie was charged with Possess Cannabis with Intent to Sell/Supply.
Both men were due to appear before the Mandurah Magistrates Court on December 6.
If anyone has information, please contact CrimeStoppers on 1800 333 000 or make a report online at www.crimestopperswa.com.au.