Detectives trying to find the body of missing Portslade father Gary Hampson have completed the latest stage of their search.
They thanked the public for their support and renewed their appeal for information about a possibly crucial clue.
Detective Inspector Phil Mays said: “I would like to thank members of the public both in Sussex and Surrey for their understanding and support while specialist search officers undertake a scoping exercise as part of the Gary Hampson murder investigation, including accessing private land.
“The scoping exercise around the area of Dunsfold was completed this morning (Wednesday 1 June) and we are continuing to review further potential sites as part of this ongoing investigation.
“We are extremely grateful to the local community for their help.
“Despite previous public appeals, we have yet to identify the owner of a red Ford Mondeo seen at Kops Cars garage in Little Western Street, Brighton, in January.”
Mr Hampson, 42, of Old Shoreham Road, Portslade, was last seen dropping his 10-year-old daughter home from school in January.
He was reported missing after he failed to contact her, having previously been in regular contact.
Detectives are now conducting a murder investigation after finding a significant amount of Mr Hampson’s blood at Kops Cars on the border of Brighton and Hove.
Former mechanic Daniel Alexander, 61, of no fixed address, has been charged with his murder and conspiring to pervert the course of justice.
Roy Bartup, 57, of Natal Road, Brighton, has been charged with conspiring to pervert the course of justice.
Both men remain in custody awaiting trial.
A 48-year-old man from Brighton arrested on suspicion of murder and bailed until Wednesday 25 May has been rebailed until Monday 20 June.
A 66-year-old Brighton woman arrested on suspicion of murder has been released on bail until Friday 17 June.
A 25-year-old man from Brighton, arrested on Monday 9 May on suspicion of assisting an offender was bailed until Friday 10 June.