Perth brick layer Nicola La Falce was 37 when he vanished and not using a hint in a suspected homicide thriller.
Practically 30 years on his household are nonetheless ready for solutions.
His father Antonio La Falce mentioned the household has had no details about Nicola's disappearance.
The brick layer vanished after visiting a pizza retailer in Wembley in 1994 - a thriller that made headlines on the time.
The 37-year-old left the store round 9pm and hasn't been seen since.
The brick layer's automobile had been dumped at Perth Airport however he by no means boarded the flight.
WA Police assistant commissioner Tony Longhorn mentioned investigators have had a number of situations up to now the place "offenders go to elaborate lengths to hide a murder".
"That features autos being left on the airport to offer the phantasm that the particular person has left the state," Longhorn mentioned.
There was no main breakthrough within the case however detectives have little doubt he's useless.
"He is not a lacking particular person - he was a sufferer of murder," Longhorn mentioned.
After many years of looking for solutions, the state's police drive are turning to the general public for assist, providing up a $500,000 for info that results in a conviction.
"Individuals preserve secrets and techniques. We hope that this amount of cash is sufficient to assist particular person rethink conserving any secrets and techniques.
Police have requested the general public to contact them if they'll supply info.
"We're immensely grateful to your assist," La Falce mentioned.