A father has spent 12 days with police in Cambodia as the search for his missing son continues.
Mike Gibson spent 12 days in Cambodia searching for his son
Eddie Gibson, 20, last contacted his family in October 2004 when he e-mailed his mother to say he was flying home.
The family of the Sussex student now say their greatest fear is that he has been robbed and murdered for money.
"The police colonel was expecting to interview certain Cambodian males who we believe know something," Eddie Gibson's father, Mike, said.
He added: "We wanted to find Eddie - that would have been fantastic.
"But realistically, the main purpose of the trip was to make sure the Cambodian authorities were taking it seriously, and I am very sure about that.
"Secondly, it was to give a press conference, so that Eddie's name and picture appeared throughout the Cambodian media, and that was successful."
The last reported sighting in Phnom Penh was by a Cambodian girl called Ami who had a holiday romance with Eddie.
His e-mail said he would be flying back into the UK on 1 November, but he never arrived when his family went to meet him at Heathrow airport.