Wade Cameron Dunn.

The arrests were made over the mid-2006 disappearance of Bradley Hugh Hoddy, also known as Bradley Hugh Schultz, a father of two sons who was not reported missing until January 2008.

After the first arrest over Mr Hoddy's murder on Monday, a forensic search was made of a bush site near a bush track off the Albany Highway, about 45km south of Armadale.

A second man was later arrested on Wednesday afternoon.

A 44-year-old South Bunbury man and a 38-year-old Ocean Reef man have been charged with murder.