Homicide detectives are questioning a person of interest following the disappearance of West Australian father Tony Ditri.
9News understands a 60-year-old man is currently in custody.
Mr Ditri, from Pemberton in Western Australia's south-west, was last seen at the local rubbish tip about 3pm on Friday afternoon.
His family became concerned when the 40-year-old father-of-three failed to appear at a dinner that night.
Following news of his disappearance, Mr Ditri's truck was found abandoned just off Pemberton-Northcliffe Road that evening.
A huge search effort was launched with SES, police and community members all involved.
Police are now treating Mr Ditri's disappearance as suspicious.