The police have confirmed that they are working through the last 35 “outstanding actions” remaining in Operation Panama, the investigation to find out what happened to the missing 20-year-old.

Detectives have said that they think he was disoriented and suffering from hypothermia after getting out of a taxi at Carrefour Selous at around midnight on 5 December after a night out, and that he probably died of exposure after seeking shelter somewhere.

In January, police told Bailiwick Express that the investigation to find Adrian was a “missing persons inquiry” and that the indications were that no-one else was involved with his disappearance, and that it is a tragic accident.

The police have also revealed that they still want potential witnesses who may have more information to come forward and speak to them. In the days and weeks after Adrian disappeared, they released descriptions of various cars and hitchhikers who may have been among the last people to see him.

The list of potential witnesses who have not yet come forward is:

–       The occupants of a silver car (possibly a VW or Citroen Saxo) parked outside David Hicks at about 11:00 pm on Friday 4December.

–       Two people with a motorcycle at the junction of Le Neuf Chemin and St Lawrence main road (just north of the entrance to St Johns Manor) at about midnight.

–       A man with a dark pullover hitchhiking up Mont Felard at about half past midnight on Saturday 5 December.

–       A man in a mustard-coloured suit walking north past Regal Construction at about 1:15 to 1:30 am.

–       A taxi moving south past Thistlegrove at 2:33 am.

–       A male with white hair hitchhiking south at about 3:00 am in the Three Oaks area.

–       Two males noisily hitchhiking north at about 3:00 am in the area of Steven Cohu antiques.

Adrian’s parents, Danny and Sharon Lynch, have spoken about their struggle to find closure after the 20-year-old disappeared on his way home from a night out on 5 December.

Adrian’s dad Danny said that the family have accepted that their son is dead, but are effectively in limbo.

At the start of this month, he told the media: “We just want to lay him to rest. We want to try and find his body, so we can find closure.

“His body still hasn’t been found, that’s what we’re struggling with most at the moment.

“Things haven’t got any better… without closure sometimes you think he might still walk through the door.”

Police scaled back the operation to find Adrian after a search effort that involved all of the emergency services, members of the public going out looking and specialist dog teams, divers, and search aircraft.