Police and search crews are back in bush near Smithers for a fourth day as they try to find a missing woman.
Mounties received a call Saturday morning after Frances Brown became separated from her cousin while picking in the Kitsegucla Road area.
RCMP Corporal Madonna Saunderson says search and rescue crews on the ground will get some additional assistance from an RCMP helicopter.
The Forward Looking Infrared (FLIR) system can detect heat signatures on the ground.
Search and rescue teams and RCMP turned up no trace of the Brown Sunday, but did find evidence of a recent campfire.
RCMP say Brown has some back country experience, is in good health, was prepared with adequate clothing, and has a lighter.