An anonymous person with detailed information about the suspicious disappearance of a British man in Brisbane 21 years ago may hold the key to solving the cold case.
Police believe Steven Goldsmith was murdered around the time he disappeared in July 2000, and there are people who know what happened.
A $250,000 reward is now being offered for information which leads to the conviction of those responsible.
One person has made contact with investigators a number of times in the years since Mr Goldsmith's disappearance.
"This caller has provided information that is very specific on what happened to Steven, I won't go into detail, but I am appealing for that person to make contact with the investigators again," Detective Inspector Damien Hansen said.
"We encourage anyone who has information and for whatever reason has remained silent, to put that aside and come forward and speak with us."
The last confirmed sighting was on July 10, 2000 when Mr Goldsmith was seen on CCTV at the Commonwealth Bank ATM in the Brisbane suburb of New Farm.
Police located his vehicle and work tools at his unit and his car keys, credit cards, passport and driver's licence were found inside his home.
There was also a load of washing still in the dryer.
At the time he was living in New Farm and worked as an arborist.
He spent time in the Fortitude Valley and New Farm areas and was known to frequent bars, clubs and boarding houses, and was experimenting with drugs, police said.
As well as the $250,000 reward, indemnity from prosecution is being offered for people not directly responsible for the crime.
"Any person who was involved in the crime but did not commit the crime who comes forward and speaks with police, is eligible for this indemnity from prosecution, Police Minister Mark Ryan said.
Mr Goldsmith was 28 years old at the time of his appearance.
He was around 175cm tall, spoke with an English accent, had red hair and freckles and a fair complexion.
He had several tattoos, including an eagle on his shoulder blade, and walked with a slight limp.
In 2007, his disappearance was referred to the Coroner whose findings determined Mr Goldsmith to be deceased.
