POLICE are asking members of the public to call immediately if they spot Carson Woodward.
They suspect that Mr Woodward can help with an investigation.
The public is asked not to approach the 20-year-old as police believe he has a gun.
He is described as fair skinned, about 170cm tall with short brown hair.
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Mr Woodward is known to frequent the Forrestfield, High Wycombe, Maddington, Camillo, Seville Grove, Byford and Cockburn Central areas.
Call police on 131 444.