“Police remain committed to returning Marley home to his family.
“This is the news that no family wants to receive, and we are offering them ongoing support.
“We would like to thank the members of the public who have provided information over the course of this search.”
Detailed searches have also been ongoing in Nicholson Park, Scarborough and the surrounding bush area near Sumner.
Police estimate more than 70 people have helped the search.
This includes foot searches, leaflet drops, area canvases, checking CCTV sources and the use of drones, Coastguard boats, alpine climbers and search dogs.
Images of the teen’s last known sighting were released by police last week.
Marley’s car, a white Mazda Demio, was found in Sumner and the last known CCTV images show Marley on Whitewash Head Rd, Scarborough, 2.55pm on the day he went missing.
Detective Sergeant Lucy Aldridge has previously described the difficulty of the search area.
“The terrain is steep rocky cliffs and dense bush, which makes it particularly challenging to search, so we are utilising the skills of experts to ensure the area has been thoroughly searched.”