Police have issued a photograph of a man they want to speak to about a series of sex offences in the 1970s.
Midland detectives believe the man was a member of the Royal Australian Navy at the time, serving on HMAS Vampire and HMAS Vendetta.
It is also believed the man is originally from New South Wales.
The sex offences took place from 1972 until 1976. The victim was a boy who was aged 6 to 9-years-old at the time.