Specialist teams scouring Crathes Estate
Specialist police teams are continuing to search for Liam.
They have concentrated efforts on the Crathes Castle and Estate grounds since receiving eyewitness reports that the schoolboy was seen getting off a bus there almost three weeks ago.
Police have used all resources at their disposal in the hunt for the 16-year-old including a helicopter, dog unit and divers.
They are expected to focus on the estate and surrounding area for the rest of the week.
The Westhhill Academy pupil went missing on the afternoon of November 17.
Liam’s family have appealed for information on his whereabouts and his mother Alix Smith has also been out searching the Crathes Castle grounds.
Chief Inspector Martin Mackay said the terrain had been difficult and added: “I know that many members of the public are still offering to assist with searches, and please don’t think your offers of help are being ignored.
“I must stress just how challenging the land is we are dealing with, ranging from dense wooded areas to expanses of water, and we don’t want anyone put in harm’s way.”
Missing schoolboy Liam Smith, 16