Brian Cairney lived with his mother at Carey Street, Salisbury.
On the evening of Thursday 17 June 2010, the 31-year old was at the Elizabeth Shopping Centre waiting to catch a bus home when he started talking to a male and female.
They all caught the bus together and swapped phone numbers, and it was agreed that Mr Cairney would see them both later that night.
At about 10pm , Mr Cairney told his mother he was catching the bus to go and visit these friends.
He was mildly affected by alcohol when he left.
He did not catch the bus and has not been seen since. There has been no activity on his bank accounts, mobile phone or Medicare card and is suspected to have been murdered.
At the time of his disappearance, Mr Cairney was on parole after recently being released from prison. It is not known if his criminal associations played any role in his disappearance.
A reward of up to $200,000 remains on offer for information that leads to a conviction in this case and/or the recovery of his remains.
If you know something then call 1800 333 000 or go to www.crimestopperssa.com.au